Elyes GabelElyes Cherif Gabel (/ˈɛliəs ɡəˈbɛl/; born May 8, 1983) is a British actor. Gabel's global breakout role was portraying computer genius Walter O'Brien in the CBS series Scorpion (2014–2018). Earlier he gained recognition as series regular Dr. Gurpreet "Guppy" Sandhu in the BBC medical drama Casualty FilmographySuspicion (2022)Justice League vs. The Fatal Five (2019)MI-5 (2015)A Most Violent Year (2014)Scorpion (2014)World War Z (2013)Boogeyman 3 (2008)