When was the character that played Walter O'Brien in "Scorpion" born? 
Walter O'Brien (character):  The character, played by actor Elyes Gabel, follows a loose trajectory of Walter O'Brien's real-life exploits that thwart terrorism and disasters in each episode of the series. Elyes Gabel: Elyes Cherif Gabel (born 8 May 1983) is an English actor.
8 May 1983