In the conclusion of a two-part story arc, an unpleasant encounter with Darrin's former sweetheart, Sheila Sommers (Nancy Kovack), leads Samantha to wonder what would have happened if she had never met Darrin. "Helpful" Endora casts as spell to allow Sam to see how Darrin's romance with Sheila would have progressed without Sam to break things up. At first, Sam is heartbroken, but this being a family sitcom, a happy ending is not long in coming. Along with the returning Nancy Kovack, Frank Wilcox makes an encore appearance as Sheila's millionaire father, J.P. Sommers. Written by Ed Jurist, "If They Never Meet" first aired on January 25, 1968. ~ Hal Erickson, Rovi