19 MCU Actors Who Were Also In LOST
3. Anson Mount
On Lost: Mount made a brief appearance in season two's "Man of Science, Man of Faith," where - in Jack's flashbacks - he portrayed Kevin, Sarah's fiancé who backed out of his engagement when Jack told him that she would need care for the rest of her life following her car accident.
In the MCU: Like Ken Leung, Mount made what's likely his only turn in the franchise in 2017's Inhumans, which saw the actor portraying king Black Bolt, the silent but deadly Inhuman Royal Family leader whose conflict with his brother Maximus forced him and his people to leave Attilan and settle on Earth by series' end.