What If...? season 3

The third and final season of the American animated anthology series What If...?, based on the Marvel Comics series of the same name, explores alternate timelines in the multiverse that show what would happen if major moments from the films of the Marvel Cinematic Universe (MCU) occurred differently. The season is produced by Marvel Studios Animation, with Matthew Chauncey serving as head writer and Bryan Andrews and Stephan Franck directing. Animation for the season is provided by Flying Bark Productions and Stellar Creative Lab, with Scott Wright serving as head of animation.

Jeffrey Wright stars as the Watcher, who narrates the series, alongside numerous MCU film actors reprising their roles. Development began by July 2022, with Chauncey replacing previous head writer A. C. Bradley for the season by December 2023. Andrews and Franck returned from previous seasons to direct.

The third season premiered on the streaming service Disney+ on December 22, 2024, with its remaining episodes releasing daily until December 29. It is part of Phase Five of the MCU.