Clash of the Mermaids

Clash of the Mermaids is the eighteenth episode of season 6 of The New Scooby-Doo Show (2017).

Plot
Tara has been poisoned by Lorelei, a mermaid from OtherWorld, and she is turning into a mermaid herself! The Mystery Inc. gang, Tara and Sparrow must find an antidote or else the young Spellbinder will have to make her home in the water for good! But, unbeknownst to the gang, except for Shaggy and Scooby, Lorelei is a childhood friend of Cal’s.

Characters
Main characters:
 * Mystery Inc.
 * Scooby-Doo
 * Shaggy Rogers
 * Fred Jones
 * Daphne Blake
 * Velma Dinkley

Supporting characters: Villains:
 * The Alpha Team
 * Tara Duncan
 * Sparrow
 * Cal
 * Master Chem
 * Odarelle (cameo)
 * Lorelei (redeemed)

Notes/Trivia

 * This is the second one-hour episode of the series.

Transcript
Clash of the Mermaids/Transcript