It's an unspoken rule in Hollywood that if you're going to turn a classic TV show into a feature film, then cameo offers must be made to the original stars of said TV show. After all, you can't know ...

For kids of the ’60s, it was a thrilling weekly ride and for adults revisiting it later, it became a time capsule of an era when television dared to mix earnest family drama with outlandish spectacle.