Bright Eyes - S1-E7
Trivia: Trask refers to Mr. Sinister's Sentinel attack on Genosha as a "mutant massacre." In the comics, there is a storyline called "Mutant Massacre," which saw Sinister tasking a group of mutants called the Marauders to kill the Morlocks. Years later, it was revealed that Gambit was hired to help sneak the Marauders into the Morlock tunnels, making him culpable in the act. This is contrary to Gambit helping to save some Morlocks from the Sentinel attack in this show.