9-1-1: Lone Star 3x13 "Riddle Of The Sphynx" Season 3 Episode 13 Promo Trailer HD - The members of the 126 race to find, and then save, a mystery victim in a car crash. Meanwhile, Owen faces a crisis in his relationship with Catherine. Tommy goes on a first date and Carlos is surprised when he meets T.K.’s AA sponsor in the all-new “Riddle of the Sphynx” episode of 9-1-1: LONE STAR airing Monday, April 11th on FOX.