This episode introduces the gang's winter clothing.
This is the final episode for which Stefanianna Christopherson provides Daphne's voice; she was replaced by Heather North starting in Nowhere to Hyde (1970).
Scenes from this episode were adapted to 3-d stereoscopic reels for the View-master in the 1970's.
The title is a pun on "That's No Ghost".
Mr. Leech's looks are clearly modelled on Peter Lorre, and his demeanour reflects Peter Lorre's character's in The Maltese Falcon.