Katherine Von Till

Robin attends court-mandated therapy sessions after assaulting a woman who was hoping to ruin Barney's relationship; Ted becomes overly involved in Lily's pregnancy.

There's a riot at the prison and Charlie is held hostage. Nolan, Lacey and Ed throw Patrick a birthday party.

Frankie struggles to land a dental assistant position with a potential boss (JACK McBRAYER), while Sue offers unsolicited advice to Darrin and Axl's band.

Charlie competes with Nolan for the attention of a hot grad student; Martin and Ed come up with a patriotic scam.

When flu season hits Medford, Sheldon takes extreme measures to remain healthy, which lands him in detention.

Mary clashes with Sheldon’s teacher over plans for a Halloween fundraiser; Georgie falls for a rebellious teenager that Sheldon is tutoring.