Ironheart ending explained: who is [spoiler], will there be a season 2, and more big Marvel questions answered

You've got questions about Ironheart's final episode, and I'm here to answer them

02 Jul 2025, 08:00 · TechRadar

News By Tom Power published 2 July 2025

Ironheart's final episode leaves plenty of plot threads dangling in the air (Image credit: Marvel Studios/Disney+)

Full spoilers immediately follow for Ironheart.

Ironheart has disengaged its thrusters. Its final three episodes landed on July 1 or 2 (depending on where you live), with the trio's arrival marking the end of the Marvel TV show's run on Disney+.

Or does it? The last Marvel Phase 5 project's finale is full of unresolved plot threads that suggest Riri Williams (Dominique Thorne) and Parker Robbins' (Anthony Ramos) stories have only just begun in the Marvel Cinematic Universe (MCU). Throw in the debut of a long-awaited Marvel villain and other interesting tidbits that might impact the MCU moving forward, and Ironheart could be more important to the MCU than we realized.

But enough babbling. Let's take a look at the biggest questions you have about Ironheart's ending and I'll do my best to answer them.

Who plays Mephisto in Ironheart? And what is he, exactly?

The demon lord known as Mephisto in Marvel Comics has finally made his MCU debut (Image credit: Marvel Studios/Disney+)

Let's address the second question first because it's easier to answer: Mephisto is played by Sacha Baron Cohen – he of Borat, Ali G, and The Trial of the Chicago 7 fame – in the MCU.

Cohen's appearance won't shock some MCU devotees. He was first linked with the role of Mephisto in October 2022 – those reports arriving 18 months after Marvel fans had convinced themselves Mephisto would be unveiled as primary antagonist of WandaVision. As it happened, Agatha Harkness was that show's Big Bad. Nonetheless, fans have longed for the day that Mephisto would finally make his bow in Marvel's cinematic juggernaut.

As for who (or what) Mephisto is: he's Marvel Comics' takes on Mephistopheles, the demon lord who appears in the Germanic fable Faust. Mephisto is also an alias of The Devil, aka the mythical personification of evil who lauds it over the realm known as Hell in many religions.

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