Even though Season 3 wrapped in February with a cliffhanger, viewers won't learn the fate of Cole and Murtaugh. Lethal Weapon began in 2016 with Damon Wayans as Roger Murtaugh and Clayne Crawford as Martin Riggs. Seann William Scott joined the cast after Crawford was fired for his on-set behavior. As Deadline recaps, "Lethal Weapon has been through the wringer since the firing of Clayne Crawford last spring over issues with on-set behavior. The show landed a last-minute Season 3 renewal after finding a new co-lead in Seann William Scott who was received fairly well by fans. Then last fall, star Damon Wayans dropped the bomb that he was going to leave after the first 13 episodes of Season 3. He later signed off for three more episodes and was reportedly open to another season." Lethal Weapon's Feb. 26 Season 3 finale was watched by just over 3 million viewers.