3x27 - The Alfred Hitchcock Hour

Martha Hunter is a mail order bride who has just moved into the rundown and not well-heated home of her new husband Luke. Martha is Luke's second wife and she becomes worried when she discovers that Luke's previous wife, who was also a mail order bride, died under mysterious circumstances on a vacation to Luke's relatives. Martha grows more fearful when she finds a offin like box and sees her husband digging in the cellar. When Luke suggests that they go one vacation she grows even more nervous. Prior to their departure, Luke insists that Martha go down to the cellar. Martha becomes terrified. She pulls a gun and kills Luke. After he is dead, she takes a look into the cellar and discovers that her husband installed a new furnace as a belated wedding gift.