Nickelodeon Jan 25, 2009 Wolverine & The X-Men S1 Ep 2 Hindsight (Part 2)

Beast and Wolverine manage to bring Shadowcat and Iceman back the X-Men, while some such as Cyclops, Colossus, and Rogue, do not wish to return. Rogue takes up the cause of the Brotherhood of Evil Mutants, who have sinister plans to attack Senator Kelly. Kelly's plan is to push forth a Mutant Registration Act. Meanwhile, Angel's father, Warren Worthington, is funding the M.R.D., building anti-mutant robots. The remaining X-Men seek to stop the Brotherhood, despite Kelly's stance on mutants. At the end of the episode, we see that it was Rogue who had betrayed the X-Men.