After a lengthy absence, the Thing returns to the Fantastic Four! But he's returned just before his ex-girlfriend Alicia's wedding to the Human Torch, and Alicia's stepfather the Puppet Master isn't happy about the nuptials! Then, when Mr. Fantastic turns down the X-Men's request to help their dying teammate Shadowcat, Dr. Doom is more than happy to offer assistance! But is he secretly plotting to drive the FF apart? He's certainly up to something when he kidnaps Franklin and offers him to Mephisto! And when Mr. Fantastic and Invisible Woman take a leave of absence, the old order changeth as the Torch's ex-flame Crystal and the new Ms. Marvel join the team - just in time to face down Diablo's vicious elementals!
Collecting FANTASTIC FOUR (1961) #296-307 and ANNUAL #20, and FANTASTIC FOUR VS. THE X-MEN #1-4.