What If? creator A.C. Bradley reveals how a comment from Jon Favreau led to the creation of the Happy Hogan-led Season 2 episode.
Review: Marvel What If…? “What If… Happy Hogan Saved Christmas?” - Bubbleblabber
What If? Season 2 Episode 3 Ending, Explained
I'm allowed to tell this story”: What If…? Season 2 Creator Reveals Iron Man Director's Strange Demand to Return for Show
Snow Days (What If Happy Hogan Saved Christmas? (Season 2/Episode 3)/Audio Only)
Who Is Purple Hulk? Happy Hogan's Marvel What If Hero Explained
How Willow Got That SPOILER Vocal Cameo in Episode 6
Marvel's What If? Head Writer Breaks Down Every Episode of Season 2
What If Happy Hogan Saved Christmas?, Marvel Cinematic Universe Wiki
Rumor: What If…? Season 2 to Feature a Happy Hogan-Led Christmas Episode - IMDb