While visiting the Scottish village of Inverness, Samantha discovers that the legendary Loch Ness monster is actually a warlock named Bruce (Steve Franken), who was transformed into his present beastly state by his jealous girlfriend -- none other than Sam's lookalike cousin, Serena. In attempting to restore "Nessie" to human form, Sam must evade Baron Von Hauser (Bernie Kopell), who is determined to capture the monster and claim a three-million-dollar reward. But when all is said and done, it turns out that Sam should have left well enough alone. The third episode of a seven-part story arc, "Samantha and the Loch Ness Monster" was written by Michael Morris, and originally broadcast on September 29, 1971. ~ Hal Erickson, Rovi