An exclusive article on TVGuide.com has announced that new episodes of Nickelodeon's Teenage Mutant Ninja Turtles series will begin again on January 25. This special Friday night episode will air at 7pm Easter / 6pm Central (check your local listings to be sure) and introduces the Rat King.
Also revealed in the article is the news that Roseanne Barr has been cast as the voice of Kraang Prime, who will appear in the season finale. Additionally, Kelly Hu has been announced as the voice of Karai, and Cassandra Peterson (aka Elvira) will be a research scientist named Mrs. Campbell.
The character design for Karai, who is presumably shown facing Leo in the picture above, has created a bit of a stir. She is said to be a rebellious teenager, which is a bit of a departure from previous incarnations of the character.