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December 21st in TV History
TV Episode Debuts
| I Love Lucy | "Ricky's Old Girlfriend" | 1953 |
| Gunsmoke | "Kitty Lost" | 1957 |
| The Adventures of Ozzie and Harriet | "A Piano for the Fraternity" | 1960 |
| 77 Sunset Strip | "The Odds on Odette" | 1962 |
| Doctor Who | "The Dead Planet (The Daleks, Part One)" | 1963 |
| The Avengers | "Death a La Carte" | 1963 |
| Gunsmoke | "The Magician" | 1963 |
| Voyage to the Bottom of the Sea | "Long Live the King" | 1964 |
| The Andy Griffith Show | "Three Wishes for Opie" | 1964 |
| The Fugitive | "End of the Line" | 1965 |
| Lost in Space | "The Dream Monster" | 1966 |
| Batman | "The Puzzles Are Coming (1)" | 1966 |
| I Spy (US) | "Father Abraham" | 1966 |
| The Beverly Hillbillies | "The Christmas Present" | 1966 |
| Batman | "The Ogg Couple" | 1967 |
| Bewitched | "Humbug Not to Be Spoken Here" | 1967 |
| Get Smart (1965) | "Schwartz's Island" | 1968 |
| Hogan's Heroes | "Will the Real Colonel Klink Please Stand Up Against the Wall?" | 1968 |
| Adam-12 | "Log 122: The Thief Who Stole Christmas" | 1968 |
| Doctor Who | "The Invasion, Part Eight" | 1968 |
| The Mary Tyler Moore Show | "An Affair to Forget" | 1974 |
| All In The Family | "The Best of All in the Family" | 1974 |
| Kojak (1973) | "How Cruel the Frost, How Bright the Stars" | 1975 |
| The Six Million Dollar Man | "The Winning Smile" | 1975 |
| Laverne & Shirley | "Christmas Eve at the Booby Hatch (aka Oh, Hear the Angel Voices)" | 1976 |
| Charlie's Angels | "Angels on Horseback" | 1977 |
| Dallas | "Love and Marriage" | 1979 |
| The Fall Guy | "Wheels" | 1983 |
| Family Ties | "To Snatch a Keith" | 1983 |
| The Dukes of Hazzard | "Sky Bandits Over Hazzard" | 1984 |
| Dallas | "Deja Vu" | 1984 |
| The Fall Guy | "Escape Claus" | 1985 |
| Airwolf | "Half-Pint" | 1985 |
| Night Court | "The Night Court Before Christmas" | 1988 |
| Dallas | "The Odessa File" | 1990 |
