 According to writer Brian Peterson , where Clark brings " angst " and " depth " to his relationship with Lana , Jason is designed to bring " joy " , " levity " , and " fun " . On the topic of Jason 's relationship with Lana , Ackles believes the character did love Lana , because he saw an innocence in her that had not been able to experience growing up in the upper class society ; Jason grew up having to question the actions of his mother , and with Lana he had the opportunity to experience an honest relationship . Ackles was Gough and Millar 's first choice to play Jason Teague , as the actor had been the runner up for the role of Clark Kent when they were casting for the pilot . Ackles was contracted to remain through season five , but was written out of the show in the season four finale , which , according to Ackles , was due to his commitments to the WB 's new series Supernatural . Gough contends that Supernatural did not alter any of their plans , and that Jason Teague was intended to be a single season character . 
