Audio problem: Tabitha is heard saying "Okay," but her lips don't move. (00:03:45)
Continuity mistake: The amount of toys on the floor suddenly increases as Michael's mother heads to the front door. (00:06:45)
Character mistake: Samantha calls Darrin's mother "Mother Stephens" throughout episode. In most episodes, she is "Mrs. Stephens." I can't find any other episode where she is "Mother Stephens".
Answer: Telstar was an early communications satellite system. Darrin, in a particularly sexist manner reflective of this era, is saying that telling a secret to a woman means it is guaranteed to be "broadcasted" to multiple people.
raywest ★