Elizabeth Montgomery Samantha Stephens, Serena Actor Dick York Darrin Stephens Actor Agnes Moorehead Endora Actor David White Larry Tate Guest Star Oliver McGowan Mr. Harding Guest Star Helene Winston Matronly Lady Guest Star John Reilly Boy 1 Guest Star Rory Stevens Boy 2 Guest Star Sharon DeBord Secretary Guest Star Bill Mumy Darrin the Boy Guest Star Bernard Slade Writer Howard Morris Director Harry Ackerman Executive Producer