John Fiedler guest stars as Fergus F. Finglehoff, a frog who has been transformed into man. Having fallen in love with a female amphibian, Fergus demands that Samantha return him to his original frog form, but only the witch who cast the spell in first place can do that. Sam's solution is to change Fergus' froggy girlfriend, Phoebe (Corin Camcho), into a human -- a bit of magic which, alas, does not alleviate the crisis. Written by Ruth Brooks Flippen, "Nobody but a Frog Knows How to Live" originally aired on April 27, 1967. ~ Hal Erickson, Rovi