The X-Men #59

With Larry Trask revealed to be a mutant, the Sentinels refuse to obey him anymore as they continue to capture mutants and prepare to kill them. Cyclops, Marvel Girl, and Beast mount an offensive to rescue their captured friends. Scott, Jean, and Hank disguise themselves as Quicksilver, Scarlet Witch, and Toad as they battle the Sentinels. Cyclops tricks the Sentinels into flying into the sun. They rescue Havok, but he is injured.