When the Defenders first battled the extraterrestrial Xemnu, they had a young ally in Jim Wilson, who alerted Dr. Strange to Xemnu's hypnotic power of children (Marvel Feature #3). By this time, Wilson had become a sidekick of sorts to the Incredible Hulk and his alter ego, Dr. Bruce Banner. Hulk's original teen sidekick, Rick Jones, had moved on by this point, having trained with Captain America before working in tandem with Captain Mar-vell. Wilson would continue to assist Hulk on occasion, but this was his only appearance with the Defenders.
This panel of Jim Wilson and Dr. Strange watching Xemnu on TV comes from Marvel Feature #3.