Year Title Role Notes 1988–1989 The Greatest Adventure: Stories from the Bible The Serpent / Judas Iscariot 2 episodes [ 8] Fantastic Max Dermot D. McDermott 4 episodes 1989 Long Ago and Far Away Abel Episode: "Abel's Island " Paddington Bear Mr. Curry 13 episodes 1990 Gravedale High Mr. Tutner 3 episodes The Adventures of Don Coyote and Sancho Panda Sultan Episode: "A Knight in Arabia" 1990–1991 Fox's Peter Pan & the Pirates Captain Hook 46 episodes [ 8] Wake, Rattle & Roll Ronald Chump 28 episodes 1990 Tiny Toon Adventures Prince Charles / Reginald Episode: "Europe in 30 Minutes" [ 8] The Marzipan Pig Narrator Television film TaleSpin Thaddeus E. Klang 2 episodes 1991–1992 Tom & Jerry Kids Sheriff of Rottingham / Banker Darkwing Duck Taurus Bulba 3 episodes 1991–1993 The Pirates of Dark Water Konk 20 episodes 1991–1994 The Legend of Prince Valiant Sir Gawain 39 episodes 1991–1996 Captain Planet and the Planeteers MAL 26 episodes 1992 Fish Police Sharkster 6 episodes Defenders of Dynatron City Atom Ed Pilot Capitol Critters Senator Episode: "Max Goes to Washington" Wild West C.O.W.-Boys of Moo Mesa Jacque Le Beefe Episode: "A Snake in Cow's Clothing" Batman: The Animated Series Henchman Episodes: "Fear of Victory" Liquid Television The Snake Segment: "Meggamorphosis" The Steadfast Tin Soldier Jack-in-the-Box Television film Eek! The Cat Narrator Episode: "It's A Wonderful Nine Lives" 1992–1994 Dinosaurs Various voices 7 episodes The Little Mermaid Evil Manta 4 episodes 1993–1994 Mighty Max Skullmaster / Jules Verne 12 episodes 1993 Droopy, Master Detective Additional voices 13 episodes[ citation needed ] 1994–1997 Aaahh!!! Real Monsters Zimbo / additional voices 19 episodes [ 8] Duckman King Chicken / Simon Desmond 10 episodes 1994 Sonic the Hedgehog King Acorn / Keeper of the Time Stones 4 episodes Aladdin Amok Mon-Ra / Caliph Kapok 2 episodes 1994–1995 Superhuman Samurai Syber-Squad Kilokahn 53 episodes [ 8] Turbocharged Thunderbirds The Atrocimator 13 episodes 1995–1997 The Mask: Animated Series Pretorius 14 episodes [ 8] 1995 Daisy-Head Mayzie Finagle Television film 1995–1996 Gargoyles Dr. Anton Sevarius 7 episodes [ 8] 1996 Adventures from the Book of Virtues King Minos / Gessler 2 episodes Quack Pack Moltoc The Story of Santa Claus Nostros Television film [ 8] 1996–1997 Mighty Ducks Lord Dragaunus 21 episodes Bruno the Kid Lazlo Gigahurtz 9 episodes 1996–1998 Jumanji Trader Slick 18 episodes 1997 Freakazoid! Dr. Mystico Episode: "Island of Dr. Mystico" [ 8] Casper Pianist Episode: "Stinkie Time Theatre" Teen Angel The Frog Episode: "Jeremiah Was a Bullfrog" 1998 Stories from My Childhood The Beast Episode: "Beauty and the Beast (A Tale of the Crimson Flower) " Where on Earth Is Carmen Sandiego? Dr. Gunnar Maelstrom 3 episodes The Net The Sorcerer 10 episodes The First Snow of Winter Voley Television film 1998–2000 Voltron: The Third Dimension Prince Lotor / King Alfor 23 episodes [ 8] 1998–2004 The Wild Thornberrys Nigel Thornberry / additional voices 92 episodes [ 8] 1999, 2003–2004 Hey Arnold! Leichliter 3 episodes [ 8] 1999 Xyber 9: New Dawn King Renard 18 episodes 1999, 2001 Big Guy and Rusty the Boy Robot Dr. Neugog 2 episodes 1999 Recess Dr. Slicer Episode: "Prickly is Leaving" Johnny Bravo Big Brother Episode: "Brave New Johnny" [ 8] Pinky, Elmyra & the Brain Monkman Episode: "Teleport a Friend" [ 8] The Titanic Chronicles Officer Lightoller Television film 2000 Martial Law The One 3 episodes Batman Beyond Mutro Botha Episode: "Final Cut" [ 8] 100 Deeds for Eddie McDowd The Rottweiler Episode: "Big Dog" [ 8] 2000–2001 Redwall Slagar the Cruel 13 episodes [ 8] 2001 Gary & Mike Jared Wexler Episode: "Crisscross" Teacher's Pet Spooky Episode: "The Tale of the Telltale Taffy" 2002–2003 Teamo Supremo Laser Pirate, Dastardly Dentist 3 episodes 2002 Samurai Jack Worm 1 Episode: "Jack Tales" Ozzy & Drix Nick O'Teen, Scarlet Fever 2 episodes [ 8] 2003–2005 The Adventures of Jimmy Neutron: Boy Genius Professor Finbarr Calamitous 8 episodes [ 8] 2003 K10C: Kids' Ten Commandments Hazzaka Episode: "The Not-So-Golden Calf" Chalkzone Jacko 2 episodes The Proud Family Pervical Episode: "The Good, the Bad, and the Ugly" 2004 Higglytown Heroes Librarian Hero 2 episodes Totally Spies! Max Sternum Episode: "Freaky Circus Much?" 2005 Duck Dodgers Magnificent Rogue Episode: "Villainstruck" [ 8] Loonatics Unleashed Ringmaster Episode: "The World is My Circus" [ 8] 2006 The Jimmy Timmy Power Hour 2: When Nerds Collide Professor Finbarr Calamitous Television film [ 8] Eloise: The Animated Series Mr. Salamone 13 episodes 2008, 2012 Phineas and Ferb Stubbings / Worthington Dubois 2 episodes [ 8] 2008 Ben 10: Alien Force Dr. Joseph Chadwick / Knight #2 Episode: "Pet Project" [ 8] 2010 Regular Show Hot Dog Leader / Master Prank Caller #2 2 episodes [ 8] 2012–2013 Young Justice G. Gordon Godfrey 8 episodes [ 8] 2012 Transformers: Rescue Bots Doctor Morocco 4 episodes [ 8] The High Fructose Adventures of Annoying Orange Arugula / Endive / Plum 2 episodes 2012–2014 Randy Cunningham: 9th Grade Ninja The Sorcerer 21 episodes [ 8] Star Wars: The Clone Wars Chancellor Palpatine / Darth Sidious 10 episodes [ 8] 2013 Wonder Pets Tin Man Episode: "In the Land of Oz" Ben 10: Omniverse Dr. Joseph Chadwick / Stage Manager Episode: "Return to Forever" [ 8] 2014 Over the Garden Wall Auntie Whispers Episode: "The Ringing of the Bell" [ 8]