Mark starts high school at a former girls' school, finding joy in theatre while navigating old friendships and new love. Pop's ham radio hobby leads him to an intercepted distress signal.

Tensions rise between rival schools as Fox finds a friend who invites her to a field party; Mark worries about older kids; Mike Jr hires Dick's daughter as the new VOCM promo girl.

On a moose-hunting trip, tensions rise between Pop and Poppy Bell, pushing Mark into a tough spot. Meanwhile, Fox distrusts her mom's new beau while Mike Sr worries about his future at VOCM.

Mark stars in a PSA for young women and meets experienced child actor Steve, who inspires him. Meanwhile, Mike Sr. relapses at Mr. Murphy's retirement event, leading to a confrontation.

On NYE Fox asks Mark to babysit while their parents double date; Ritche imparts advice leading to a big blowout; Mike Jr and Amanda share sparks, and Pop has a blast at home.

On a field trip, Mark and Cara fall asleep in the same bed, resulting in a scandalous photo circulating school. Meanwhile, Mike Sr struggles with his memoirs and Mary has a mid-life crisis.

Mark invites Fox to a party with his grown-up theatre troupe where he frustrates her by acting like an adult. Dick is upset to find Mike Jr. dating his daughter.

Mark is stunned after a friend dies and the school mourns a classmate few remember. Meanwhile, Mary takes a course but is mistaken for the instructor. Mike Sr and Pop take an emotional train ride.

Mark joins the Peace A Chord concert but takes the spotlight; the Fox family struggles with Susanne's engagement. Mary seeks support while Ritche struggles to earn his father's approval.

When school is cancelled, Mark spends the day with Pop touring St. John's; Mary enters the Miss Mall pageant, and Dick crashes Mike Jr.'s dinner with Amanda's mom.

Fox volunteers at Paul's house for a chaotic party, while Mark struggles to keep order. Mike Jr., Dick, and Amanda drive the Party Wagon, and Mary juggles tasks for her internship.

Mark's sketch show gets its big break the same night as Fox's mom's wedding. Mary organizes it, and Fox finds the courage to give a speech. Mike Sr. confronts Pop over a health concern.