Eve's mother is coming to town and Gildy will meet his future mother-in-law for the first time. While driving with Eve to the train station, Gildy stops the car to get a kiss, and the car won't start up again.
Liz and George discover both of their mothers are planning to visit, and they try to stop them, but George's mother insists on coming anyway and will stay six weeks. Liz tries her best to get George's mother to leave.
It's Mother's Day, and Riley and the kids present Peg with a breakfast in bed along with gifts. Peg gives Riley a gift too, which she does every year, and while Riley is out of the room, Peg tells the kids the story of why she gives Riley a gift on Mother's Day.
George invites an old friend who works at MGM as a plumber and doesn't want anyone to know, but Gracie learns he works at MGM and thinks he's a big shot at the studio and tries get her friend into show business.
The McGees are taking a bus trip and are warned there may be a pick pocket around. While on the bus, and Molly fast asleep, Fibber learns his money is missing and tries to borrow some from the passengers.
A writer is hired by a radio producer who takes him to his beach house to write a perfect script, but the writer soon learns to his horror, the fate of all the other script writers hired by this producer.
Host Georgie Jessel introduces Al Jolson who sings "Rosie You Are My Posey", then sings "Give My Regards To Broadway" with Georgie. Groucho Marx sings "Dr. Hackenbush" and then preforms a scene with Chico Marx from their film "A Day At The Races."
Charlie tells Bergen he's on a hunger strike because Bergen cut off his allowance. Bergen tries to help Mortimer with his bad memory. Elsa Maxwell hosts a party for Charlie and presents him with a gift.
Charlie is still trying to find his birth certificate to find out about his past, and tries to find other McCarthys in the phone book in hopes of finding his parents. Bill Thompson introduces Bergen to a Gremlin named Harvey. Charlie and Guest Teresa Wright perform a skit with Teresa as Charlie's mother.
Jack talks about the trouble he has making a new movie. Dennis talks about the April Fool's jokes he played the day before. The cast performs a play written by Don Wilson. Jack is mad at Rochester for pawning Jack's polar bear. Schlepperman pays Jack a visit.