Photo: Cliff Lipson

SAMANTHA WHO? - "The Butterflies" - Sam begrudgingly sets Dena up on a date with her boss in order to use her clueless friend to help persuade him to shut down a construction project that would destroy an endangered butterfly habitat. Meanwhile, Sam can't understand why Todd has been ignoring her ever since they shared a passionate kiss, on "Samantha Who?," MONDAY, APRIL 21 (9:32-10:02 p.m., ET) on the ABC Television Network. (ABC/RANDY HOLMES) CHRISTINA APPLEGATE