Y
- James Yagi ("No Time Like the Past")
- Sally Yarnell ("To Serve Man" (uncredited))
- Dick York ("The Purple Testament" and "A Penny for Your Thoughts")
- Carleton Young ("To Serve Man" (as "Carlton Young"))
- Jack Younger ("Cavender Is Coming")
- Gig Young ("Walking Distance")
Read more about this topic: List Of The Twilight Zone (1959 TV Series) Guest Stars