You will Watch Avengers Assemble Season 2 Episode 21 online for free episodes with HQ / high quality. Stream cartoons Avengers Assemble S02E21 Spectrums. Ant-Man begins to atone by bringing his former allies to justice where he starts with reclaiming his technology from Whirlwind. His quest for redemption leads the team to an epic battle with Doctor Spectrum (who was one of the people Ant-Man sold his technology to) as he is assisted in battle by Captain America, Iron Man, and Thor. During the battle, Spectrum uses his powers to manifest nightmarish versions of Ultron, Loki and Winter Soilder to attack Iron Man, Thor, and Captain America. Meanwhile, the others enter Hyperion’s sunken citadel to see what the Squadron Supreme are planning and they learn a shocking secret about Doctor Spectrum’s Power Prism.