A trumpet player in a radio orchestra falls asleep during a commercial and dreams he's Athanael, an angel deputized to blow the Last Trumpet at exactly midnight on Earth, thus marking the end of the world.

Englishmen fighting Nazis in Africa discover an exotic mystery woman living among the natives and enlist her aid in overcoming the Germans.

When American couple Janet and Mike move to England for his business, she soon fears he's having an affair with his attractive secretary and decides to get back at him by pretending she has been unfaithful.

Katharine Hilliard, mousy dean of a stuffy music school, meets and is insulted by swing band leader Barry Clayton on a train. To "show" him she takes a friend's advice, removes her glasses, and puts on a designer gown. Naturally, she becomes gorgeous. Soon, both Barry and crooner Jimmy Hale are after her, and she finds herself in the midst of triangles and misunderstandings.

About the only thing kept in this film from Preston Sturges origianl story for "The Miracle of Morgan's Creek" is a girl that gets drunk, gets married, gets pregnant and doesn't even remember any of it. A major dirrerence is that "The Miracle of Morgan's Creek" was a classic comedy and "Rock-a-Bye Baby" isn't. This time out, Clayton Poole (Jerry Lewis) is a small town TV repairman who is still in love with his former hometown sweetheart, Carla Naples (Marilyn Maxwell), who is now a famous movie queen. When Carla becomes pregnant due to a hasty marriage in Mexico, which she has forgotten about, the studio tells her a baby will ruin her career so she turns to Clayton, the only person she can trust, and he agrees to care for the baby when it is born. Carla gives birth to triplets and Clayton finds he must get married before he can adopt them. He marries Sandy (Connie Stevens), Carla's younger sister who has always loved him. The press learns about Carla's triplets and she tells reporters she is secretly married to Clayton. Clayton, having rapidly gone from no wife and kids to two wives and three kids, goes into hiding. He returns after several months---nine to be exact for those old biddies who are counting---and learns that Sandy has given birth to quintuplets.

In 1861, Countess Angelina, ruler of Bergamo in southeastern Europe, is at a loss when invaded by a Hungarian army. Her lookalike ancestress Francesca, who saved a similar situation 300 years before, comes to life from a portrait to help her descendant. Complicating factor: the newlywed countess feels strangely drawn to the handsome Hungarian invader, Colonel Teglash, who commandeers the castle to give his exhausted soldiers a rest, but later falls in love with the owner of the place.
The film was Lubitsch's first musical project since directing The Merry Widow for MGM in 1934. It proved to be his last film. Eight days after principal photography began, he died of a heart attack, and Otto Preminger, who had completed A Royal Scandal when Lubitsch was forced to withdraw due to illness in 1944, took over the reins. He stipulated sole screen credit should go to Lubitsch "as a mark of respect and admiration for the departed master."

Amateur plumber Cluny Brown gets sent off by her uncle to work as a servant at an English country estate.

London. A mysterious serial killer brutally murders young blond women by stalking them in the night fog. One foggy, sinister night, a young man who claims his name is Jonathan Drew arrives at the guest house run by the Bunting family and rents a room.

Dictator Adenoid Hynkel tries to expand his empire while a poor Jewish barber tries to avoid persecution from Hynkel's regime.