Return to the Spider-Verse: Part 1 is the sixteenth episode of the fourth season of Ultimate Spider-Man.
- S.H.I.E.L.D. Trainees
- Doctor Strange/Stephan Strange
- Madame Web/Julia Carpenter
- Spyder-Knight/Peter Parker
- Spider-Ham/Peter Porker
- Blood Spider/Peter Parker
- Wolf Spider/Peter Parker
- Rio Morales
- Spider-Girl/Petra Parker
- Spider-Man 2099/Miguel O'Hara (cameo)
- Spider-Man/Peter Parker (cameo)
- Drake Bell as Spider-Man
- Ogie Banks as Kid Arachnid and Vampire Power Man
- María Canals Barrera as Rio Morales
- Greg Cipes as Iron Fist and Vampire Iron Fist
- Chi McBride as Nick Fury
- Liam O'Brien as Doctor Strange
- Dee Bradley Baker as Lizard King
- Benjamin Diskin as Spider-Ham and Blood Spider
- Christopher Daniel Barnes as Spyder-Knight and Wolf Spider
- Cree Summer as Madame Web and Vampire White Tiger
- This episodes marks the return of the Spider-Verse and the Web-Warriors.
- The four part episode where Spider-Man and Kid Arachnid have to go retrieve parts of the Siege Perilous is a reference to the video game: Spider-Man: Shattered Dimensions.