Robbie's ma lost her house and moved away without him and moving in with Cheryl also fell through, so Eric finds him studying outside, yet keeping up top marks. He promises to find a shelter and takes him home meanwhile. Despite embarrassing episodes, all the fault of Camden girls, Robbie proves himself a model house-guest. So Matt finds the couch occupied when chased from his dorm by John, who is completely besotted with Priscilla Carter. Simon keeps is foxy new date Sasha a secret until she arrives in a BMW. Lucy is passively jealous when Mike Pierce announces he got early college acceptance, then goes over to make up and thus discovers his ma's disabling mental condition.

An item found in a lost wallet starts speculations whether it's Simon's or Robbie's and how to make sure it doesn't mean their dates go too far. None of the siblings gives Mary the triumphant welcome she hoped for at her first weekend visit, so Robbie is scolded for not wildly kissing her.

Matt is terrified when summoned stat for a psychological session, standard for med students. After an unsatisfactory attempt to be 'coached' by therapy-experienced Mike, Matt lands with Doc, who turns out to be fraud and yet a godsend. Simon wants to break up with older, yet immature Sasha, but lets various advice how to go easy on her complicate things for him. Eric confronts a rather blunt hospital doctor about what to tell terminal patients like Harold Mann about their life expectancy and why.

Robbie and Lucy gather the courage to tell everybody about their affair, only to find they all knew and don't really care. Without the thrill of sneaking, their first date fizzles. Ben Kinkirk and Mary both pass the firefighters course, but their meeting on whether to celebrate with classmates messes up Mary's reconciliation with fiancé Wilson., and Billy's questions make Wilson decide against her plan to elope. Matt discovers that Hank and Julie are planning a divorce, and Eric and Annie try to find out why and see if they can help fix it.