May 21st in TV History
Birthdays
| Richard Hatch | 1945 in Santa Monica, CA | - Battlestar Galactica | |
| Mr. T | 1952 in Chicago, IL | - The A-Team |
Deaths
| Clint Walker | 2018 in Grass Valley, CA |
TV Show Debuts
The Ray Bradbury Theater (1985)TV Shows Ended
The New Mike Hammer (1984) (1989)Newhart (1990)
MacGyver (1992)
Earth 2 (1995)
Wings (1997)
TV Episode Debuts
| The Adventures of Ozzie and Harriet | "A Tuxedo for David" | 1954 |
| The Phil Silvers Show | "Bilko's Perfect Day" | 1957 |
| The Adventures of Ozzie and Harriet | "The Magic of Three" | 1958 |
| Gunsmoke | "The Bobsy Twins" | 1960 |
| The Addams Family (1964) | "The Winning of Morticia Addams" | 1965 |
| Doctor Who | "The O.K. Corral (The Gunfighters, Part Four)" | 1966 |
| The Avengers | "Bizarre" | 1969 |
| Taxi | "Latka the Playboy" | 1981 |
| Murder, She Wrote | "Mirror, Mirror, On the Wall (2)" | 1989 |
| Murphy Brown | "Going to the Chapel (2)" | 1990 |
| L.A. Law | "Say Goodnight, Gracie" | 1992 |
| 3rd Rock From the Sun | "See Dick Run: Part 1" | 1996 |