This news was posted today over on the TMNT official Facebook page :

It’s finally here… Casey Jones makes his debut on Saturday’s episode of TMNT @ 11am/10c on Nickelodeon!

We’re also giving you an exclusive sneak peek at the Casey Jones action figure by Playmates Toys, as well as the chance to win one before they hit shelves! Details: http://www.tmntfanclub.com/