Sneak Peek was first released as part of the sixth series (1987). He was also available in 1988 and was discontinued in 1989.

Webmaster's Note:
On Sneak Peek's filecard, the character's name is "Owen S. King." Owen King is the son of famous horror author Stephen King. Legend has it that Hasbro named Sneak Peek after Owen, who at the time was a huge G.I.Joe fan, because Stephen King created the character Crystal Ball.