[s1e20] The Siren's Song -

"The Siren's Song" - Scooby-Doo! Mystery Incorporated (S1E20)

: It is often praised for its "creepy mystery" and the emotional depth given to Velma's character. [S1E20] The Siren's Song

: Amy is revealed to be the wife of Dr. Spike Cavenaugh, Destroido’s former chief of geology. She manipulated Velma into helping her rescue her husband, who had been kidnapped by the Fish Freaks. "The Siren's Song" - Scooby-Doo

: Features the primary voice cast, including Mindy Cohn as Velma and Frank Welker as Fred/Scooby. [S1E20] The Siren's Song