On '30 Rock', Jack Donaghy mentioned that Kevin Sorbo introduced him to his podiatrist. Normally, such a mention of a celeb's televersion wouldn't be worthy of a mention here in the blog. (But it would still count towards that televersion's presence in Toobworld.)
However, Kevin Sorbo is no ordinary celebrity televersion. Within the reality of Toobworld, he also starred in the TV show 'Hercules: The Legendary Journeys'. But he's also the actual demi-god Hercules, only working under the alias of "Kevin Sorbo".
Jack's mention of Kevin Sorbo as part of his fictional life connects '30 Rock' to both 'Hercules: The Legendary Journeys', the various TV movie prequels and sequels, and to 'Xena, Warrior Princess'.
Kevin "Hercules" Sorbo may one day find himself on the Birthday Honors List for the TV Crossover Hall Of Fame.