In 2004, he began his first regular television series, in the crime drama "", in which he plays Detective Mac Taylor. He was credited as a producer from season two onwards and wrote the storyline of an episode. Several episodes have allowed Sinise to demonstrate his musical prowess, including a season-two episode where Mac Taylor plays the bass guitar in a jazz club with musicians Kimo and Carol Williams and Danny Gottlieb, members of the Lt. Dan Band, which Sinise and Kimo Williams co-founded in 2003. The band is named for Sinise's character in "Forrest Gump".