Chloe and Christi Lukasiak reminisce about the past and explain what was going on behind the scenes.

Abby takes a look back and explains the method behind the madness.

Emotions run high as the team prepares for their final Nationals competition as the Irreplaceables; with four solos, the girls go head-to-head to see who can come out on top; the mothers and the girls contemplate what their future holds.

With one week until Nationals, Cheryl adds an old rival to the team, but the moms aren't happy with sharing the spotlight. Kalani suffers a catastrophic injury, putting her solo and the group routine in jeopardy, and the pressure of winning brings Camryn to her breaking point.

With no sign of Abby, The Irreplaceables and the ALDC both find new choreographers to take her place. Famed dancer Cheryl Burke joins the Irreplaceables as they take on their opponents. But, the girls' insecurities and their doting mothers prove to be a struggle for Cheryl and her teaching methods. Meanwhile, the ALDC struggles to stay together and bring Abby back.

In part 2, The Irreplaceables and The ALDC go head-to-head at competition for the first time. Abby's team competes a fan-favorite group number while the older girls shock the audience with a mature routine that causes an uproar from Abby and her minions.

The Irreplaceables and The ALDC go head-to-head at competition for the first time. Abby's team competes a fan-favorite group number while the older girls shock the audience with a mature routine that causes an uproar from Abby and her minions.

A preview of the next new episode of the show.

In part 2, Abby makes an unexpected return to her studio, but not everyone on the team is happy about it. Chloe performs for the first time in front of Abby in two years, but struggles with missing her old teammates. Ashlee makes a decision that sends shockwaves through the group, and after an unexpected series of events, the team will never be the same.

Abby makes an unexpected return to her studio; Chloe performs for the first time in front of Abby in two years, but struggles with missing her old teammates; Ashlee makes a decision that shocks the group.

A preview of the next new episode of the show.

Abby makes an unexpected return to her studio, but not everyone on the team is happy about it. Chloe performs for the first time in front of Abby in two years, but struggles with missing her old teammates. Ashlee makes a decision that sends shockwaves through the group, and after an unexpected series of events, the team will never be the same.

Laurieann Gibson returns, determined to win; with two duets and a group dance, the girls struggle with stamina as well as their new leader's cutthroat attitude; Laurieann loses her patience with the mothers at a competition.

A preview of the next new episode of the show.

Laurieann Gibson returns and is more determined than ever to win, which has proven harder than she thought. With two duets and a group, the girls struggle with stamina as well as their new leader's cut throat attitude. Laurieann loses her patience with the moms at competition in an explosive face-off.

Additional scenes from the reality series.

With Abby missing in action, Laurieann Gibson pushes the girls out of their comfort zones with professional-level choreography; Kalani and Brynn compete head to head with out-of-the-box solos; the group routine provokes a fight between two mothers.

With Abby missing in action, Laurieann Gibson pushes the girls out of their comfort zones with professional level choreography. Kalani and Brynn compete head-to-head with out of the box solos. The group routine focuses on a hot-button issue and provokes two jealous moms to have one of the craziest fights in Dance Moms history!

Additional scenes from the reality series.

The mothers bring in choreographer Laurieann Gibson, which shakes things up; Chloe returns to the competition world for the first time in two years.

With Abby away and her sentencing looming over everyone's head, the moms bring in world-renowned choreographer, Laurieann Gibson. Laurieann's intensity and passion shakes things up at the ALDC, but will her unique methods and choreography be enough to win?  Meanwhile, ex-ALDC member Chloe returns to the competition world for the first time in two years to dance against her former teammates.

A preview of the next new episode of the show.

With Abby away and her sentencing looming over everyone's head, the moms bring in world-renowned choreographer, Laurieann Gibson. Laurieann's intensity and passion shakes things up at the ALDC, but will her unique methods and choreography be enough to win? Meanwhile, ex-ALDC member Chloe returns to the competition world for the first time in two years to dance against her former teammates.

Additional previously unaired scenes from the reality series.

The mothers butt heads with Abby over a vegan-inspired routine; Kendall, Brynn and Kalani compete; the team says goodbye to Abby when she leaves for Europe.

A preview of the next new episode of the show

The moms butt heads with Abby over a vegan-inspired routine, while Kendall, Brynn and Kalani compete with head-to-head solos. The team says goodbye to Abby for possibly the last time when she decides to head to Europe one week before her sentencing, making the moms question the future of the ALDC.

Additional previously unaired scenes from the reality series.

News spreads about Abby's approaching court sentencing; Abby's denial creates havoc for the team; Abby creates a group dance centered around Ashlee and Brynn's family court battle.

A preview of the next new episode of "Dance Moms.''

It's the first week back and the news quickly spreads that Abby's court sentencing is just two weeks away. With the clock ticking, the moms are desperate to know what Abby's plans are for the future, but Abby's total denial creates havoc for the team. Instead of focusing on her own court case, Abby creates a group dance centered around Ashlee and Brynn's family court battle, forcing Brynn to face emotionally charged subject matter through dance.

Highlighting Abby's past and her deepest fears for the future as she faces the harsh reality of going to prison; Abby discusses her past mistakes, what she has learned and what fans can expect from her upon her release.

ALDC battles the Candy Apples for the final time this season, each trying to win the coveted title of National Champions. Abby breaks down when faced with an uncertain future, and a surprise guest makes an appearance that shocks the whole team.

It's the week of the National Championship and Abby hits a major creative roadblock with the group routine. Brynn, Kalani, Lilliana, and Elliana are assigned solos, leaving Holly and Jill fuming that the original members are left out. Kendall premieres her long awaited music video, and a former ALDC dancer contemplates paying a visit to her old teammates.

The team returns to Pittsburgh, but the stress of proving themselves on the East Coast leads to some of the most explosive battles between the moms all season. Abby questions Camryn's desire to be on the team and gives her one last chance to prove herself. The war between the ALDC and the Candy Apples rages on in their final face-off before Nationals.

In the final week before the ALDC heads to Pittsburgh for Nationals, the elite girls struggle with a difficult ballet routine and get the cold shoulder from Abby; Abby becomes obsessed with the mini soloists; Kendall resumes her stalled music career.

Dance instructor Abby Lee Miller works with young girls to help them prepare for dance competitions; Abby has a conflict with two of the mothers when they cross the line.

It's the last week in LA before the ALDC heads to Pittsburgh for Nationals. The elite girls struggle with not only a difficult ballet group routine, but also the cold shoulder from Abby who is obsessed with the mini soloists. Meanwhile, Kendall resumes her stalled music career with a new music video shoot.

Kalani, Kendall and Nia all dance competing solos in Denver; the minis work on a technically complicated group dance, and the mothers wonder if this addition will ruin their winning streak heading into Nationals.

The ALDC travels to Denver where both the stakes and the altitude are high! For the first time this season Kalani, Kendall and Nia all dance competing solos. Much to the elite's dismay, the minis are in a technically complicated group dance, and the moms once again wonder if this addition will ruin their winning streak heading into Nationals.

Abby auditions a new dancer to be a part of the Great 8 team heading to Nationals; Brynn, Lilly and Maesi all go head-to-head with solos; the mothers are hopeful that a new dancer will complete the team, but Ashlee thinks otherwise.

The ALDC's revolving door continues as Abby auditions a new dancer to be a part of the "Great 8" team heading to Nationals. Brynn, Lilly, and Maesi all go head-to-head with solos. And, the moms are hopeful the new dancer will complete the team, but Ashlee thinks otherwise when her mom insults Brynn.

Abby brings the girls to a cemetery to get them in the spirit for a graveyard-inspired routine; the mothers are frustrated when Brynn is given a special part; Elliana and Lilliana are given head-to-head solos for the first time.

Abby takes the girls to a cemetery to get them in the spirit for a graveyard-inspired group routine. The moms are frustrated when once again Brynn is given a special part. Elliana and Lilliana are given head-to-head solos for the first time, but the pressure causes Yolanda to go too far at competition.

Abby and the ALDC try to break a long-standing losing streak in Fresno, Calif.; Holly's nerves fray when Abby announces the theme for a controversial group dance; Elliana and Maesi's duet brings out the worst in their mothers.

Abby and the ALDC try to break the long standing losing streak in Fresno, CA. Holly's nerves are frayed when Abby announces the theme for a controversial and racially-charged group dance. Meanwhile, Elliana and Maesi's duet brings out the worst in Yolanda and Jamie's already toxic relationship.

With Nationals only six weeks away, the mothers begin to worry about the ever-changing team; Nia gets her first solo; Abby gives two new dancers a chance to shine; the veteran mothers go on the attack when a new mother insults their children.

Nationals are only six weeks away, but a constantly changing team have the moms worried. Nia gets her first solo in a year and Abby gives two of her new dancers a chance to shine on stage. Meanwhile, the veteran moms go on the attack after one of the new moms puts down their kids.

Abby brings in a new dancer with an eccentric mother; Abby encourages Brynn to lead Kalani and Kendall in their trio; Abby assigns the first hip-hop routine since the elites walked out, making the mothers nervous.

After the brutal dismissal of one dancer, Abby brings in a new dancer with an eccentric mom and gives her a challenging trio with the two minis. Abby encourages Brynn to lead Kalani and Kendall in their trio. The moms are fearful of ruining the ALDC's winning streak when Abby assigns the first hip-hop routine since the elites walked out. Will they be able to bring home another win?

Abby challenges Daviana and Kalani to one of the toughest head-to-head solo showdowns ever. And, old tensions erupt when two minis rejoin the team and compete for a spot in the group dance. In a shocking move, Abby eliminates one dancer from her super team.

Abby and the ALDC bring an edgy group routine to this week's competition in hopes of overtaking Cathy and her Candy Apples for the second week in a row; Kendall dances a solo and is determined to beat Nicaya.

Abby and the ALDC bring an edgy group routine, inspired by Kalani's 16th birthday, to this week's competition hoping to overtake Cathy and her Candy Apples for the second week in a row. Kendall dances a Maddie-esque solo determined to beat Nicaya.

Abby challenges the Junior Elites to a head-to-head competition and makes changes to the team; Abby brings in two new girls in hopes of finding her super team; Abby's biggest rival returns.

Abby challenges the Junior Elites to a head-to-head competition and makes big changes to the team. In the hopes of finding her super team, Abby sends some girls home and brings in two new girls. But, when Abby's biggest rival returns, the moms worry about her ability to hold it all together.

After an eight week break, Abby reaches out to the Junior Elite mothers and asks them to come to the ALDC to hear an announcement.

After an explosive competition and eight week break, Abby reaches out to the Junior Elite moms and asks that they come to the ALDC to hear an announcement that she believes will change everything.

The elite girls stop at nothing to prove that they can win without Abby as their instructor, while Abby tries her hardest to stay strong and prove her worth on the dance floor with her mini team.

The elites leave for rival Erin Babbs, blindsiding Abby and the mini team; Abby gives three mini dancers their first solos; Kendall and Nia get invited to perform live with a beloved recording artist.

The elite dancers become spread thin when Abby books a demanding commercial shoot for the team; a chain of events could lead to a big rift between Abby, the mothers and the elite girls.

Abby's trial hits the news again; the mothers speculate about the ALDC's future; Brynn gets put to the test with her first solo of the season; the elites become tasked with a challenging dance; Abby shows attention to the minis.

Abby choreographs an emotional dance after the ALDC learns of tragic news from Kira and Kalani's hometown; the minis attempt to make a comeback with their group number; JoJo is tested beyond her limits by a difficult ballet duet.

Abby punishes the minis for their poor performance and awards the elites their first solos of the season; Jill infuriates Abby when she makes a decision about Kendall's music; the media uncovers secrets from one mother's past.