After "Uncle Martin" (Ray Walston) has manipulated Chloe the dog into entangling it's owner Laura with Tim O'Hara (Bill Bixby), Laura says of Chloe, "She's just been full of the devil". Tim glances in the direction of Martin as he says "Yes, I know what you mean". One of Walston's most famous roles was as the devil in DAMN YANKEES, released only five years previously. The role may have influenced the casting of Walston as the devilish Martian.