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- Ralph Taeger ("From Agnes—With Love")
- Sarah Taft ("Death Ship")
- Robert Tafur ("To Serve Man")
- George Takei ("The Encounter")
- Stephen Talbot ("Static" and "The Fugitive")
- Charles Tannen ("To Serve Man" (uncredited))
- Mark Tapscott ("Still Valley")
- Dub Taylor ("The Last Rites of Jeff Myrtlebank")
- Ferris Taylor ("Mirror Image")
- Rod Taylor ("And When the Sky Was Opened")
- Vaughn Taylor ("Time Enough at Last", "Still Valley", "I Sing the Body Electric", "The Incredible World of Horace Ford" and "The Self-Improvement of Salvadore Ross")
- Ray Teal ("Printer's Devil")
- Irene Tedrow ("Walking Distance" and "The Lateness of the Hour")
- Dan Terranova ("The Big Tall Wish") (uncredited)
- Phyllis Thaxter ("Young Man's Fancy")
- Charles P. Thompson ("Printer's Devil")
- David Thursby ("The Trouble With Templeton")
- Jim E. Titus ("The Incredible World of Horace Ford")
- Dan Tobin ("A Penny for Your Thoughts")
- Franchot Tone ("The Silence")
- Arthur Tovey ("Escape Clause") (uncredited)
- Marc Towers ("The Fever")
- Harry Townes ("The Four of Us Are Dying" and "Shadow Play")
- Dwight Townsend ("The Hitch-Hiker") (uncredited)
- Russell Trent ("Perchance to Dream") (uncredited)
- Paul Tripp ("The Fugitive")
- Barry Truex ("Kick the Can") (uncredited)
- Ernest Truex ("What You Need" and "Kick the Can")
- Natalie Trundy ("Valley of the Shadow")
- Wayne Tucker ("A Nice Place to Visit") (uncredited)
- James Turley ("To Serve Man" (uncredited), "Showdown with Rance McGrew" (as Jim Turley), "The Silence" (uncredited), "Long Distance Call" (uncredited) and "The Lonely" (uncredited))
- Moria Turner ("The Shelter")
Read more about this topic: List Of The Twilight Zone (1959 TV Series) Guest Stars