What If... Happy Hogan Saved Christmas? - S2-E3
Trivia: Among the numerous references to Die Hard, Happy and Darcy mention Reginald VelJohnson, who played Sgt. Powell. VelJohnson appeared in a deleted scene for Avengers: Endgame.
If This Be... M.O.D.O.K.! - S1-E1
Trivia: When M.O.D.O.K. and Austin are out on town, the places they visit make references to several other Marvel characters. The dragon that is serving them in the restaurant is Fin Fang Foom. The concert they are next shown to be attending is advertising Lila Cheney, who in the comics is a mutant who can teleport over interstellar distances. Lastly, the arcade belongs to Arcade, who is primarily an enemy of the X-Men. (00:10:27 - 00:10:58)