In the fifth-season finale, Melinda confronts a poltergeist in the hospital, initiating a final battle with the forces that threaten Melinda and her son.

When the ghost Melinda is trying to help suddenly turns up alive, she finds herself in the middle of a dangerous revenge plot and battling enemies she was unaware she had.

Melinda helps the ghost of a boy who was kidnapped, but her life is threatened in the process.

When a fun night out turns dangerous for three teens, Melinda investigates an unsolved kidnapping that may put her in more danger than she anticipated.

A ghost makes an accusation against a nanny, claiming she's evil, but Melinda needs more than the ghost's word, so she sets out to investigate the situation.

A ghost dressed as a clown haunts Melinda, and she discovers that he was a private investigator, but she needs to learn more about his last case in order to give the spirit closure.

A ghost controls the pen of a graphic novelist and creates violent scenarios that come true.

Melinda rescues a child ghost who has been trapped in a house for years by violent spirits.

A ghost tells Melinda about a secret munitions dump containing unexploded bombs, and then reveals that one of the bombs is missing and that someone will die as a result.

Ned's occult-anthropology professor (Margaret Cho) is stalked by a secret-admirer ghost.

A ghost haunts a patient in the hospital.

A family hides a secret that Melinda must discover before it destroys the family, and also destroy a young couple who have recently fallen in love.

The Grandview radio station is haunted by a ghost seeking revenge over a broadcast in which secrets regarding his death were revealed.

Melinda investigates when the ghost of a high-school student claims a policeman murdered him. The teen's death was ruled to be the result of a skateboarding accident.

Melinda worries about Aiden when he's befriended by the ghost of a girl who died from leukemia.

A ghost takes Melinda to his murdered body, entangling Melinda in a criminal mystery.

Jim thinks that one of his colleagues could be involved in a med student's disappearance; and Melinda worries when Aiden mentions that he's afraid of "the shadows."

The headless horseman from Washington Irving's "The Legend of Sleepy Hollow" comes to life and haunts Melinda, and she fears for Aiden when the book shows up at his school.

Melinda helps one of Eli's patients who thinks his sister's ghost is haunting him. Meanwhile, Jim and Melinda are concerned when Aiden mentions his new friends, who are something other than ghosts.

Melinda goes to a hospital morgue that is being haunted by the ghost of a surgeon who is reliving a failed surgery.

Eli's father has a heart attack, and the traumatic event leads Eli to a reunion with his deceased mother who carried a secret to her grave 10 years earlier and hasn't been able to cross over.

A chain e-mail with a malevolent force threatens the residents of Grandview.

In the fifth-season opener, Melinda gives birth to a boy, who has her gift of seeing the dead.