Lost In Space (Season 1, Episode 26)

Penny encounters an interstellar fugitive named Ohan whom she helps, and he gives her a talking disc that leads to a great treasure. Soon a galactic lawman named Bolix arrives looking for Ohan, but the disc is what he's really after. Smith learns of the disc and follows it to the treasure – a box containing a metal collar that turns anything he touches into pure platinum. Smith's Midas touch quickly becomes a curse when the collar will not come off and he accidentally turns Penny into a platinum statue.