Another episode featuring Bill Mumy, and also from season 3 (you can tell what I've been watching lately!), is the creepy Long Distance Call, in which young Master Mumy coverses with his recently deceased grandmother through a toy telephone that she gave him for his birthday just before she passed away. There's just something about communicating with the dead that I've always found a little unnerving. How would any of us react if we picked up the telephone and heard the voice of a deceased loved one on the other end?
"Give me grain or give me death!"