It's end of school year, Mark is faced with changes and challenges ahead, but when he's tasked with giving the graduation speech he takes some time to reflect on how his friends and family shaped him.

When Mark finally gets the chance to take the stage as a stand-up comedian, he realizes he doesn't have his own distinct voice. And so, Mark draws inspiration from those who matter the most to him.

The Critches are doing their annual airing out the house ritual, but when some family secrets are uncovered, it turns out they've got some dirty laundry that needs to be aired too.

When Mark starts a business venture as a school project, he quickly realizes that running a profitable company is more than having a good haircut, talking loudly, and exploiting underlings.

Mark discovers "Santa" has come early when he finds his brand-new gaming system hidden in the house. Mark can't help himself and starts playing with his gift, but he has to keep it under wraps!

Mark takes directing the school play too seriously and finds himself without a cast and crew. Mark stubbornly tries to perform the play alone but realizes he's not a one-man-show.

Mark has a near-death experience and he's left questioning life, death, and the afterlife. Is there a god? Has he chosen the right one? And most importantly, does this change how Fox feels about him?

Mark is elated to find he has not one, but TWO valentines, but juggling two girls turns out to be harder than Mark expected, and so instead of two plus-ones, Mark ends up with none.

Mark and his friends are excited for Bonfire Night, but their innocent night takes a turn when Fox gets roped into her brother's illegal activities.

When Mark realizes his friends think his comic book collection is immature, Mark impulsively sells them all and quickly regrets it.

Mark faces bathroom woes. Fox finds herself parenting her brothers. Poppy Bell visits and family tensions rise.

Mark and his friends compete on "Reach for the Top," but when the game starts and they face Mark's crush, Cara, Mark's heart sets his brain to stun.

Mark is eager to begin his final year of elementary school; finally, he'll be at the top of the social food chain; when Mark discovers that he needs glasses, his cool guy dreams come tumbling down.