Cast: Seth Green (Leonardo), Sean Astin (Raphael), Greg Cipes (Michelangelo), Rob Paulsen (Donatello), Mae Whitman (April), Hoon Lee (Splinter), Josh Peck (Casey Jones), Eric Bauza (Tiger Claw / Crimson Leader), Brian Bloom (Captain Ryan), Scott Menville (Crankshaw Jr. / Nefrini #1), Mark Hamill (Kavaxas)
Written By: Randolph Heard
Directed By: Sebastian Montes
Ep: 106
The Forgotten Swordsman
Cast: Seth Green (Leonardo), Sean Astin (Raphael), Greg Cipes (Michelangelo), Rob Paulsen (Donatello), Mae Whitman (April), Josh Peck (Casey Jones), Kelly Hu (Karai), Eric Bauza (Tiger Claw), Michael Hagiwara (Tatsu), Gwendoline Yeo (Shini), Christian Lanz (Fishface / Foot Soldier #1), Clancy Brown (Rahzar), Mark Hamill (Kavaxas)
Written By: Peter Di Cicco
Directed By: Alan Wan
Ep: 107
Heart of Evil
Cast: Seth Green (Leonardo), Sean Astin (Raphael), Greg Cipes (Michelangelo / Pizza Delivery Boy), Rob Paulsen (Donatello), Mae Whitman (April), Eric Bauza (Tiger Claw / Vic / Vinnie / The Hammer / Masks), Kelly Hu (Karai), Brian Bloom (Don Vizioso), JB Smoove (Bebop), Fred Tatasciore (Rocksteady / Suit Man / Masks), Mark Hamill (Kavaxas)
Written By: Gavin Hignight
Directed By: Rie Koga
Ep: 108
End Times
Cast: Seth Green (Leonardo), Sean Astin (Raphael), Greg Cipes (Michelangelo), Rob Paulsen (Donatello), Mae Whitman (April), Kevin Michael Richardson (Undead Shredder), Kelly Hu (Karai), Josh Peck (Casey Jones), Eric Bauza (Tiger Claw / The Hammer), JB Smoove (Bebop), Fred Tatasciore (Rocksteady), Christian Lanz (Fishface), Peter Lurie (Leatherhead / Z), James Hong (Ho Chan), Brian Bloom (Captain Ryan), Scott Menville (Crankshaw Jr.), Mark Hamill (Kavaxas)
Written By: Brandon Auman
Directed By: Sebastian Montes
Ep: 109/110
When Worlds Collide
Cast: Seth Green (Leonardo), Sean Astin (Raphael), Greg Cipes (Michelangelo), Rob Paulsen (Donatello), Mae Whitman (April), Kelly Hu (Karai), Brian Bloom (Captain Ryan), Keith David (Sal Commander), Scott Menville (Crankshaw Jr.), Kate Micucci (Rook), Nolan North (Bishop / Pawn / Utromdroids / General R'Kavaka), Cassandra Peterson (Queen), Peter Stormare (Lord Dregg), Danny Trejo (Newtralizer), Zelda Williams (Mona Lisa)
Written By: Todd Casey & Elliott Casey & Eugene Son
Cast: Seth Green (Leonardo), Sean Astin (Raphael), Greg Cipes (Michelangelo), Rob Paulsen (Donatello), Yuki Matsuzaki (Usagi), Keone Young (Jei), Evan Kishiyama (Kintaro), Brittany Ishibashi (Akemi / Joroguma)
Written By: Brandon Auman
Directed By: Sebastian Montes
Ep: 113
Kagayake! Kintaro
Cast: Seth Green (Leonardo), Sean Astin (Raphael), Greg Cipes (Michelangelo), Rob Paulsen (Donatello), Yuki Matsuzaki (Usagi), Keone Young (Jei), Evan Kishiyama (Kintaro), Cary-Hiroyuki Tagawa (Sumo Kuma)
Written By: Henry Gilroy
Directed By: Alan Wan
Ep: 114
Lone Rat and Cubs
Cast: Seth Green (Leonardo), Sean Astin (Raphael), Greg Cipes (Michelangelo), Rob Paulsen (Donatello), Hoon Lee (Splinter), Nolan North (Krangdroid / Norman)
Written By: Kevin Eastman
Directed By: Alan Wan
Ep: 115/116/117
Raphael: Mutant Apocalypse
Cast: Sean Astin (Raphael), Seth Green (Leonardo / Maximus Kong), Rob Paulsen (Donbot), Greg Cipes (Michelangelo), Jessica DiCicco (Mira), Nyambi Nyambi (Verminator Rex / Eyewear Ravager / Painted Ravager / Jock Ravager), Keith Morris (Reptilicus), Kevin Michael Richardson (Honey Badger Ravager #2 / Grill Ravager / Leather Ravager / Aviator Ravager / Scale Tail Scribe / Scale Tail), Dee Bradley Baker (Chompy / Ravager Spy / Honey Badger Ravager #3 / Top Hat Ravager / Scale Tail #1 / Scale Tail #2 / Mini-Zoid / Synthezoids), Brian Bloom (Captain Ryan / Scale Tail #3), Scott Menville (Crankshaw Jr. / Cyberg Leader / Scale Tail), Dave B. Mitchell (Dr. Mindstrong)
Written By: Brandon Auman & Peter Di Cicco & Gavin Hignight
Directed By: Rie Koga & Sebastian Montes & Alan Wan
Ep: 118
The Curse of Savanti Romero
Cast: Seth Green (Leonardo), Sean Astin (Raphael), Greg Cipes (Michelangelo), Rob Paulsen (Donatello), Mae Whitman (April), Josh Peck (Casey Jones), Brian Bloom (Captain Ryan), Ashley Johnson (Renet), Scott Menville (Crankshaw Jr. / Mr. Gigabyte / Man #2), Grant Moninger (Pharoah Mummy / The Monster)
Written By: Peter Di Cicco
Directed By: Rie Koga
Ep: 119
The Crypt of Dracula
Cast: Seth Green (Leonardo), Sean Astin (Raphael), Greg Cipes (Michelangelo), Rob Paulsen (Donatello), Ashley Johnson (Renet), Graham McTavish (Savanti Romero), Dana Delorenzo (Esmeralda), Dimitri Diatchenko (Vulko / Werewolf / Lone Knight), Grant Moninger (Pharoah Mummy), Chris Sarandon (Dracula)
Written By: John Shirley
Directed By: Sebastian Montes
Ep: 120
The Frankenstein Experiment
Cast: Seth Green (Leonardo), Sean Astin (Raphael), Greg Cipes (Michelangelo), Rob Paulsen (Donatello), Kevin Michael Richardson (Shredder / Super Shredder / Undead Shredder), Ashley Johnson (Renet), Graham McTavish (Savanti Romero), Grant Moninger (Dr. Frankenstein / Igor / The Monster / Pharoah Mummy), Chris Sarandon (Dracula)
Written By: Brandon Auman
Directed By: Alan Wan
Ep: 121
Monsters Among Us!
Cast: Seth Green (Leonardo), Sean Astin (Raphael), Greg Cipes (Michelangelo), Rob Paulsen (Donatello), Mae Whitman (April), Josh Peck (Casey Jones), Ashley Johnson (Renet), Graham McTavish (Savanti Romero), Grant Moninger (The Monster / Pharoah Mummy), Chris Sarandon (Dracula), Dimitri Diatchenko (Vulko / Lead Knight)
Written By: Kevin Burke & Chris "Doc" Wyatt
Directed By: Rie Koga
Ep: 122/123/124
Wanted: Bebop & Rocksteady
Cast: Seth Green (Leonardo), Sean Astin (Raphael), Greg Cipes (Michelangelo), Rob Paulsen (Donatello), Mae Whitman (April), Kevin Michael Richardson ('87 Shredder), Brian Bloom (Captain Ryan / Evil Captain Ryan), JB Smoove (Bebop), Cam Clarke ('87 Leonardo / '87 Rocksteady), Townsend Coleman ('87 Michelangelo / Clerk), Pat Fraley ('87 Krang), Barry Gordon ('87 Donatello / '87 Bebop), Corey Feldman (Slash), Kelly Hu (Karai), Scott Menville (Crankshaw Jr. / Evil Crankshaw Jr. / Punk), Josh Peck (Casey Jones), Robbie Rist (Mondo Gecko), Fred Tatasciore (Rocksteady), Gwendoline Yeo (Shini)
Written By: Peter Di Cicco & Mark Henry & Jed MacKay
Directed By: Rie Koga & Sebastian Montes & Alan Wan
