Fantastic Four #5, page 13, panel 2
Writer: Stan Lee
Artist: Jack Kirby
Uncredited Inks: Joe Sinnott
Uncredited Letters: Art Simek
Today's Flame On is set in piratical times, as the three male members of the team have stepped through Doctor Doom's time platform to claim Blackbeard's treasure (which, let's face it, is a pretty inauspicious start for one of the Marvel universe's heaviest hitters). Having been forcibly recruited to the crew of a pirate ship, the team cut loose to fight for their freedom. Here, Johnny activates his flame powers to melt a pirate's sword, much to his surprise.
Check out our coverage of Fantastic Four #4 in our third episode: Super Villain Cavalcade