Joe Dominguez. Joe is Nash's partner. He has a wife, Inger, and a little baby girl named Lucia. He also has a grown daughter named Maria. Joe is a funny guy with a great sense of humor. Now that he is no longer Nash's official partner, Joe and Nash have a P.I business on the side.
Harvey Leek. Harv is partnered with Evan. He loves the Greatful Dead and wears a black armband in memory of Jerry Garcia. Harvey is easy-going and gentle, but he can be tough when he needs to be. He has a Great Dane named King.
Evan Cortez. Evan is Harvey's partner. He is in love with Nash's daughter, Cassidy. Evan is the youngest member of the SIU, and has volatile temper that has gotten him in trouble at least once. With his dangerous good-looks and Dweezil Zappa-sideburns, Ev looks more like a criminal then a policeman.
Caitlin Cross. Caitlin is an MCD agent and not really a member of the SIU, but she might as well be. She spends more time there locking horns with Nash then anywhere else! Caitlin is very attracted to Nash, but he also annoys her to no end. She can't decide whether to kiss him or kill him. if I were her, I'd choose the former...