Marvel's Guardians of the Galaxy - Season 3 Episode 20 -

Now in Asgard, the Avengers and Valkyrie meet up with Thor who just returned from the Galactic Council where they plan to stop the Darkhawk invasion. After a fight with the Destroyer, the Guardians of the Galaxy are imprisoned along with Thor and Loki for disobeying Odin's laws while Heimdall and Valkyrie are reassigned to guard Odin's chambers. During this time, it is revealed that the Darkhawks were created by Odin's brother Serpent in an earlier plot to conquer Asgard. The Guardians begin accusing one another of being Darkhawks, unaware that they brought along a robot duplicate of Rocket.