Alice suspects that a diner regular is really an incognito mobster.

Flo's vanity keeps her from getting the eyeglasses she obviously needs.

To Mel's disappointment, the girls take him at his word when he says he doesn't want a 50th-birthday party.

Alice takes Mel up on his boast that he can raise her son better than she.

Mel sells the girls a car that won't start.

Mel identifies a holdup man who has a record for assaulting a previous witness.

The diner personnel try to kick their bad habits.

Mel is unhappy because Alice's second job — delivering singing telegrams — makes her late for the diner.

Flo and Mel's brother (Carmine Caridi) decide to take a chance at marriage — even though it's the fourth time for each.