[s1e20] The Siren's Song -

The gang eventually uncovers a plot by and his group of radical environmentalists. Dressed as "Fish Freaks," they plan to trigger a massive oil spill to destroy the environment as a way to "save it" by proving its vulnerability. Key Revelations

: Velma discovers that Destroido covered up an incident from 20 years ago, which explains why no records existed in the local papers. Production Details Air Date : This episode originally aired in mid-2011. [S1E20] The Siren's Song

In the episode "[S1E20] The Siren's Song," the series leans into its overarching mystery while focusing on Velma’s feelings of isolation within the gang. Plot Summary The gang eventually uncovers a plot by and

"The Siren's Song" - Scooby-Doo! Mystery Incorporated (S1E20) Production Details Air Date : This episode originally

: This episode marks a major turning point in the series’ central mystery. Velma confronts Angel Dynamite , accusing her of being Cassidy Williams , a member of the original Mystery Incorporated who vanished years ago.