13 Cast replacements they hoped you wouldn’t notice! Character actor replaced by, show
Laurie Ann Foreman - Lisa Robin Kelly replaced by Christina Moore, That 70s Show
Becky Conner - Sarah Chalke replaced and was replaced by Lecy Goranson, Roseanne
Darrin Stevens - Dick Sergeant replaced Dick York, Bewitched
Victor [Halliwell] Bennett - James Read replaced Tony Denison, Charmed
Lionel Jefferson - Damon Evans replaced and was replaced by Mike Evans, The Jeffersons
Miss Ellie Ewing - Barbara Bel Geddes replaced by Donna Reed replaced by Barbara Bel Geddes, Dallas
‘Aunt’ Vivian Banks - Janet Hubert was replaced by Daphne Maxwell Reid
Major Tony Nelson - Larry Hagman was replaced by Christopher Bolton in the sequel, I Still Dream of Jeannie
Chris Partridge - Brian Forster replaced Jeremy Gelbwaks, The Partridge Family
JohnBoy Walton - Richard Thomas replaced by Robert Wightman replaced by Richard Thomas, The Waltons
Spartacus - Liam McIntyre replaced Andy Whitfield, Spartacus
On Batman - Eartha Kitt repalced Julie Newmar as Catwoman, John Astin replaced Frank Gorshin as Riddler, and Eli Wallach replaced Otto Preminger as Mr. Freeze.
13 Cast replacements they hoped you wouldn’t notice! Character actor replaced by, show
Laurie Ann Foreman - Lisa Robin Kelly replaced by Christina Moore, That 70s Show
Becky Conner - Sarah Chalke replaced and was replaced by Lecy Goranson, Roseanne
Darrin Stevens - Dick Sergeant replaced Dick York, Bewitched
Victor [Halliwell] Bennett - James Read replaced Tony Denison, Charmed
Lionel Jefferson - Damon Evans replaced and was replaced by Mike Evans, The Jeffersons
Miss Ellie Ewing - Barbara Bel Geddes replaced by Donna Reed replaced by Barbara Bel Geddes, Dallas
‘Aunt’ Vivian Banks - Janet Hubert was replaced by Daphne Maxwell Reid
Major Tony Nelson - Larry Hagman was replaced by Christopher Bolton in the sequel, I Still Dream of Jeannie
Chris Partridge - Brian Forster replaced Jeremy Gelbwaks, The Partridge Family
JohnBoy Walton - Richard Thomas replaced by Robert Wightman replaced by Richard Thomas, The Waltons
Spartacus - Liam McIntyre replaced Andy Whitfield, Spartacus
On Batman - Eartha Kitt repalced Julie Newmar as Catwoman, John Astin replaced Frank Gorshin as Riddler, and Eli Wallach replaced Otto Preminger as Mr. Freeze.
Dr Rudy Wells - played by Martin Balsam, Alan Oppenheimer, and Martin E. Brooks, The Six Million Dollar Man
During one episode, to save money, they used old footage of Oppenheimer (in a flashback scene) along with with current footage of Brooks.
)