In 2011, Denisof reprised his recurring role in "How I Met Your Mother", as Sandy Rivers; he ultimately appeared in 10 episodes total, and his last appearance was in the episode "Gary Blauman". In a season 1 commentary, creators Craig Thomas and Carter Bays speculated that Denisof was initially reluctant to take the role back in 2006 because he feared it was just charity work on account of his wife, Hannigan, playing a main character on the show. They went on to state that he was not aware, until they actually told him, that they were huge fans of his work dating back to his time on "Angel".