Richards has so far been featured in four series as an attorney: Beginning in the first episode of season five of Angel, "Conviction," Gunn becomes a Lawyer after having his brain upgraded with a comprehensive knowledge of the law (both human and dæmonic) by the international and interdimensional law firm Wolfram & Hart. In 2006, Richards joined the cast of NBC's Law & Order spin-off Conviction as Billy Desmond, an undefeated New York City Assistant District Attorney with political aspirations. He has also been featured in CBS's CSI: Miami as the Floridian attorney Bob Villa, and portrayed attorney Marcus McGrath in the TNT series Raising the Bar until its cancellation.