 Jane <unk> of AOL 's TV Squad wrote , " Another great episode tonight , and some of the little symbols we see leading into commercials were actually in tonight 's episode , " referring specifically to the <unk> butterflies and the frogs / toads found in the basement . Andrew Hanson of the Los Angeles Times took notice here of the pattern of Easter eggs <unk> the next episode of the series . This feature of the show had earlier been touched on in an interview with showrunner Jeff Pinkner . As an example , the previous episode " The <unk> " had contained a shot of a butterfly on a <unk> , foreshadowing the <unk> butterfly attack in this episode . 
