Nicholas Lyndhurst has said he believes Only Fools and Horses would never be made today.
He told the Radio Times he believes that TV companies would not take a chance on a show like that now.
"TV companies turn down good scripts because they're not prepared to let them develop," he said.
"A talent show will pick up seven million viewers and they can't afford to nurture something that initially will only have a million."
"Only Fools would never be made today, nor Dad's Army."
Only Fools and Horses, which featured Lyndhurst as the hapless Rodney and David Jason as his wide boy brother, had a slow start and it was only when it got to its third series that it became a ratings hit.
It was eventually voted the nation's favourite sitcom in a BBC poll.
Lyndhurst is about to join the cast of New Tricks, replacing Alun Armstrong in the veteran detective series.
The show, which stars Dennis Waterman, Amanda Redman and Denis Lawson, is in its tenth series and has been a ratings success.
Lyndhurst said he was not impressed with the talent shows that TV companies are willing to put money into.
He said he felt watching talent shows was "cruel", and compared watching Britain's Got Talent to "selling tickets to Bedlam" - referring to the Bethlem Royal Hospital for the mentally ill, which allowed the public to pay to look at the patients in the 18th century.
"It's cruel to watch these deluded people - the judges as well, sometimes," he said.
"They don't need to be talented and that's a shame because you don't want to watch people who can't do it."
He admitted his son Archie has inherited the "acting gene" and is at the Sylvia Young Theatre School.
But he worries about what sort of industry he will enter when he leaves.
"I can hardly say, 'Darling, do all this training and the best thing will be Celebrity Dog Watch'. Take away the talent shows, celebrity cook shows, skating, dog training, dancing, putting people on an island - and what's left?
"I've been asked to go on all of them," he admitted.