Mr. D

Gerry is forced to sub at an inner-city school; the Xavier staff fears Robert is having a nervous breakdown; Ted decides to hang out for the day.

Gerry's new educational assistant, Marty, becomes a source of irritation in the classroom when he challenges Gerry's authority.

Gerry is asked to coach the wrestling tournament and promises to bring home trophies; Simon discovers his Jewish roots; Frank breaks up with Lisa.

Gerry sells One Direction merchandise then finds out the band is in town; the teachers look for excuses to avoid room 207A; Frank's expenditures are questioned.

Gerry is promoted to full-time teacher and quickly realizes he has full-time responsibilities.

Gerry vows to get retribution against former Olympic champion Donovan Bailey.

When Gerry and Simon get student teachers, Gerry's hands-off approach fails; Bobbi starts taking supplements; Emma's characters bear a resemblance to some of the staff.

Gerry decides to form a teachers union at Xavier; Malik bails on his janitorial duties; Lisa has a crush on Trudy's brother.

Gerry is forced into covering Saturday detention; Robert and Lisa have a heart-to-heart.

Gerry is assigned to help Ricki prepare for a fencing tournament; Bobbi invites Dwyer over for dinner in an attempt to seduce him.

Gerry is confronted by his overprotective and obnoxious mother; Bobbi tries to palm off the role of staff punching bag; Ricki sells pencils to Robert.

Gerry meets a beautiful woman while on a leadership retreat; Lisa finds out about Trudy's gambling ring; Simon and Frank's game takes an ugly turn.

Upon his 40th birthday, Gerry finds a letter he wrote to himself 10 years ago; Simon's ferret goes missing; Lisa tries to impress the chairman of the board of trustees.