Doug was the abusive boyfriend of Sarah. She met him after Brandon Walsh and Brenda Walsh fished her out of the ocean after drunkenly surfing and almost drowning. While Sarah seemed to be trying to get sober, Doug didn't seem to share the same goal. He showed up one night drunk at her apartment and refused to leave. Sarah called Dylan McKay, who was attending A.A. meetings with her.
Dylan came over and Doug made threats, but ultimately left at Dylan's instruction. However, he later returned and Sarah was drunk. When Dylan came over to check on her, Doug took a shot at Dylan, who knocked him down with a left punch, but then left at Sarah's request as she attended to Doug.