Thomas "Tommy" Walker is a fictional character on the ABC television series Brothers & Sisters.

In a 2010 episode, actor Cody Longo portrayed a teenage Tommy in flashback sequences set in 1986.

Like his father, Tommy is a conservative Republican, though this is rarely touched on with the exception of the backstory of when his younger brother Kevin came out of the closet he was the one who was the least accepting of the news.

Tommy spent years working under his father and his uncle, Saul Holden, at Ojai Foods, hoping he would be able to take over the business someday.

Soon, Nora, Justin, and Kitty found out what had been kept from them, and after an initial period of betrayal at being kept in the dark, they got over their disappointment in Tommy, Sarah, and Kevin, and tried to accept Rebecca.

Julia plunged into a depression which worsened as the months passed and she found fault in every decision Tommy made as a parent.

Tommy was stunned, but even more so when Julia told him it was a good idea, because she blamed him for baby William's death and she needed some time away from him.

After Julia and Elizabeth left, Tommy began getting closer to Lena, the new office manager at his company.

Julia was shocked when he told her he'd had an ongoing affair with Lena, and there was some tension as she felt what he did was worse than the one night.

He eventually made contact with Julia, who told him about the charges being dismissed, but he insisted he was not coming back as he needed to figure out who he was resulting in the end of his marriage.