Marvel's "Ironheart" finally introduces Mephisto (Sacha Baron Cohen) to the MCU. But after years of delays, does it work?

A fter years of speculation, teases, and countless fan theories, the MCU has finally pulled the trigger on one of its most elusive and long-awaited characters: Mephisto. The demonic villain made his official debut in ‘ Ironheart ’ Episode 6.

At its core, Ironheart explores how far people will go to make up for their past failings — and how those efforts can go wrong. Even a noble goal can lead someone down a dark path, the show suggests,