When Thanos attacks the Watcher on the Moon, the Avengers must travel there to stop him from acquiring the Power Stone.
- Bittersweet Ending: Thanos is driven away and the Power Stone destroyed, but Arsenal is destroyed in the process. Though Tony vows to rebuild him.
- Continuity Cameo: Arsenal generates a hologram of Howard Stark.
- Lawful Stupid: The Watcher’s Alien Non-Interference Clause allows Thanos to wallop him to Earth.
- Remember the New Guy?: The show is clearly anticipating people being familiar with Uatu the Watcher, as the characters are all familiar with him.
- Where I Was Born and Razed: Thanos wiped out his home planet of Titan.
