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Season 3

No. Title Guest star(s) Directed

by

Written by Original air date
1 "Mystery Solver, PhD" Kelsey Grammer TBA TBA TBA
2 "Spinach-Packin' Scooby!" Popeye TBA TBA TBA
3 "Song of the Siren" Lady Gaga TBA TBA TBA
4 "Ghosts in Your Court" LeBron James TBA TBA TBA
5 "Clash of the Freds!" Fred Figglehorn TBA TBA TBA
6 "Will the Real Comic Please Stand Up?" Will Ferrell TBA TBA TBA
7 "Best of Both Groovy Worlds!" Miley Cyrus TBA TBA TBA
8 "The Shaggy Relativity" Sheldon Cooper TBA TBA TBA
9 "Mystery for the Man of Steel" Superman TBA TBA TBA
10 "The Incredible Shrinking Meddling Kids!" Melissa McCarthy TBA TBA TBA
11 "Fight Against the Demon Lights!" Alicia Keys TBA TBA TBA
12 "Rage of the Redneck Ghost" Larry the Cable Guy TBA TBA TBA
13 "Spooky Mystery Playdate" Ryan Kaji TBA TBA TBA

Season 4

No. Title Guest Star(s) Directed by Written by Original air date
1 "Mighty Morphin' Mystery!" Tommy Oliver TBA TBA TBA
2 "A Monster in an Iron Mask!" Robert Downey Jr. TBA TBA TBA
3 "Lights, Camera, Mayhem!" Steven Spielberg TBA TBA TBA
4 "The Tattoo of Terror" Justin Bieber TBA TBA TBA
5 "Three Scares, You're Out!" Mark Wahlberg TBA TBA TBA
6 "Spooks on a Train" Roseanne Barr TBA TBA TBA
7 "The Vile Vampire Vixen" Kristen Stewart TBA TBA TBA
8 "Strike of the Serpent" ALF TBA TBA TBA
9 "Myths and Monsters" Jamie Hyneman and Adam Savage TBA TBA TBA
10 "Green with Evil" Green Lantern TBA TBA TBA
11 "Monster Match" Dwayne "The Rock" Johnson TBA TBA TBA
12 "Beauty is Skin Deep" Megan Fox TBA TBA TBA
13 "A Goon at High Noon" Kurt Russell TBA TBA TBA
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