Doogan

Doogan was a biker of the Hell's Angels.

Trinity
After Dean Schrock sent Barny to kill Jack Bauer, Doogan and Dean sprinted away from Castaic Dam to avoid the blast. However, when Dean noticed there was no explosion, he told Doogan to head back so they could see what went wrong. Doogan and the others found out that Jack was still alive, and they chased after him on their motorcycles. Before any of them could kill Jack, Jack set off a stack of plastic explosives he planted on his own bike. The explosion killed Dean and all of his bikers, Doogan included.