S1 E26: Martian Mice
Tom and Jerry chase each other around on a farm. Tom pretends to be a chicken, but a UFO catches both Tom and Jerry, thinking that Tom is a chicken. The aliens in the UFO need 2000 eggs for the queen's cake, and they already have 5. Thus, the aliens tell Tom to lay 1995 more eggs. He tries as hard as he can to lay those eggs, but Tom fails. The aliens try to put him in an extractor, and he runs away. They search the kitchen and are then confronted by the princess, who always reminds them of a 'cream puffs' incident the two servants got in trouble for. They make the cake anyway, unaware they had baked Tom and Jerry into it, and they deliver it to the queen. However, the queen discovers Tom and Jerry and demands her servants to "put it back and get a real chicken, OR ELSE!". The servants try to get a real chicken this time, but abduct a cow instead. Tom is about to chase Jerry again—but then inexplicably lays an egg!
