- S.H.I.E.L.D. Trainees
- Doctor Stephen Strange
- Madame Web
- Blood Spider (Peter Parker) (First appearance)
- Wolf Spider (Peter Parker) (First appearance)
- Rio Morales
- Spider-Girl (Petra Parker)
- Spider-Man (Miguel O'Hara) (Appears on a computer screen, TV, or hologram only)
- Spider-Man Noir (Peter Parker) (Appears on a computer screen, TV, or hologram only)
- Mecha Spider-Man (First appearance) (Appears on a computer screen, TV, or hologram only)
- The Kraken (First appearance)
- Invisible Man (Mentioned)
Spider-Ham, Spyder-Knight, and Miles Morales' mother Rio suddenly appear at Peter Parker's house. Upon being brought to K'un-L'un by Iron Fist, Spider-Man and Kid Arachnid meet with Nick Fury, Doctor Strange, and Madame Web who states that the shattering of the Siege Perilous scattered it's fragments to many dimensions, and if they are not collected in time, many universes will crash onto another, and eventually, all of the universes would be destroyed. Using the shard of the Siege Perilous, Spider-Man and Kid Arachnid are sent on a trip to the different dimensions to collect the shards. Their first stop is an alternate Manhattan that is infested with vampires and they have their encounter with the vampire Blood Spider who is the last superhero in Manhattan and has the first Siege Perilous shard. They find the shard in the sewers and encounter the vampiric Lizard King and Wolf Spider who plans to use the Siege Perilous shard to block out the sun so that vampires can roam the Earth. After they are defeated, Wolf Spider manages to get collect one of the Siege Perilous, and reveals his intentions to collect all of the Siege Perilous in order to rule all of the universes. He also reveals he knows Spider-Man's identity of Peter Parker.
- The video game that Peter and Miles were playing at the start of the episode uses Spider-Man's sprites from the Marvel vs. Capcom games.