Andy, Barney and Gomer are a trio of laughs as they tread the boards of a "haunted house.
Herman's preoccupation with his ham radio set leads to difficulties when he mistakes some children at play for a group of visitors from another planet. In a nearby playground, two young boys play with a walkie-talkie set and decide to pretend that they are men from Mars. At the same time Herman's radio signal picks up the message and believes he has made contact with outer space.
Eddie comes home from school an tells the family that he must bring a pet for his class' annual pet contest. Since the ferocious and gigantic dog, refuses to leave his hiding place under the stairs and the cat is too common of an animal, Eddie decides to bring Grandpa's pet bat, Igor.
Kimble makes a careless error disclosing his whereabouts and Lt. Gerard hastily returning from a vacation with his wife closes in.
Greenhorns board Adams' wagon train for a journey to California. Guest: Mickey Rooney.
