Marvel's Ultimate Spider-Man (2012)

S4E7 Beached

Spider-Man, Iron Spider, Agent Venom, Kid Arachnid, and Scarlet Spider are on the hunt for Doctor Octopus's secret hideout. While Spider-Man and Iron Spider are unexpectedly ambushed by Vulture, they track him to a nearby island, where they encounter a swarm of Sandman clones. As Spider-Man battles these duplicates, Iron Spider discovers a hidden lab where Doctor Octopus has imprisoned the real Sandman, creating clones in his quest for the "Ultimate Sandman" to recruit for the Sinister Six. After rescuing Sandman and allowing Doctor Octopus to escape, Spider-Man permits Sandman to disperse throughout the Triskelion.