Mel gets a reluctant Joe to agree to couple's therapy to work on their constant arguing. But she's completely caught off guard when the therapist turns out to be Joe's ex-girlfriend. Meanwhile, Lennox is conflicted about dating her Teaching Assistant after Zander shows up on her porch.

When Mel and Joe discover Lennox is secretly dating her teaching assistant Emerson, Joe talks Mel into putting her foot down and forbidding the relationship. But things don't go as planned, and Lennox ends up moving out… and into Emerson's apartment. Meanwhile, Ryder is stuck at the Canadian border after leaving his passport somewhere in the house.