Classic X-Men #17 (1986)

FN

Script Chris Claremont
Pencils John Byrne (pages 3-19); Kieron Dwyer (pages 1-2)
Inks Terry Austin

Beast comes a calling and finds X-Mansion empty so he tracks the X-Men to a carnival in Texas where they are performing as sideshow freaks. Mesmero is uncovered as the culprit, but once his hold is broken over the team, Magneto shows up to crash the party.