Sam Lewis Underwood is an English actor who portrayed the twins Luke and Mark Gray in the Fox thriller drama The Following, Jake Otto in the AMC series Fear the Walking Dead (2017), and Adam Carrington in The CW series Dynasty (2019–2022).

Fear the Walking Dead is an American post-apocalyptic horror drama television series created by Robert Kirkman and Dave Erickson for AMC. It is a spin-off to The Walking Dead, which is based on the comic book series of the same name by Kirkman, Tony Moore, and Charlie Adlard. It is also the second television series within The Walking Dead franchise. The first three seasons serve as a prequel, focusing on a blended family who experience the start of the zombie apocalypse. Subsequent seasons run concurrently to the original show, with Morgan Jones from The Walking Dead crossing over into the series.