S1·E24 Pipe Dream

Ryan's father Ray, a small-time inventor, rolls into town and announces that he's achieved great financial success and is planning to finally marry. Ray's managed to do so with the aid of a pipe given to him by Lewis Vendredi, which allows him to totally disintegrate first the young inventor whose ideas he stole, and then his rivals in the company he's working for. Eventually Ryan and Micki discover the truth. When Ray tries to kill Micki with the pipe, Ryan throws himself in the way. Ultimiately reconciled with his son, Ray then takes the blast of smoke for himself, dying to save his son.