For "Lost in Space" cast members young and old, the family-friendly sci-fi series was a unforgettable stepping stone. More for You. Donald Trump's Approval Margin Swings 11 Points in 2 Weeks.

Most know that Lockhart and Mumy starred in TV’s sci-fi classic Lost in Space (1965-68), which followed the Robinson family as they set out to find an alternate planet to inhabit as Earth’s ...