The Letter People - Soft G (April 8, 1978)

Plot: Mister J and Sophie finds a rare gem from an art museum and displays it in his junkyard. Later, he finds out from his radio (which is quite hilarious, I might add) that it's the dangerous Genius Gem, which makes someone disappear if their sound doesn't go with their name. However, he finds this out AFTER Mister G visits him, touches the Gem, and disappears! In order to bring Mister G back, Mister J decides to let him borrow his Jumbled Junk sound before silent E. This process allows Mister G to come back and when he touches the Gem again, he doesn't disappear.
Starring: Sophie, Mister J, Mister G, Miss E, Officer Jabberwocky, Mister P, and Miss A.
Release Date: April 8, 1978
Filming Date: January 15, 1978
Filming Location: NBC Studios in Rockefeller Center