6. Adam Baldwin (Marcus Hamilton)
Episodes: "Underneath"; "Origin"; "Time Bomb"; "Power Play"; "Not Fade Away". Famous For: Serenity/Firefly; Full Metal Jacket; Chuck; Predator 2. Marcus Hamilton, as played by Adam Baldwin, appeared in five episodes of the final season of Angel. He was one of the Children of the Senior Partners - a mysterious cabal of tremendously powerful demons also known as the Wolf, the Ram and the Hart - created by them many years go, and came to Wolfram and Hart to replace Eve as Angel's liaison to them. Having succeeded Eve, Hamilton makes it very clear to Angel from the start that he is not like her and will not be pushed around as the Senior Partners presumably felt Eve had been. He begins advising Angel very closely when the latter joins the Circle of the Black Thorn, going so far as to kidnap Drogyn - an ally of Angel's - to use as a sacrifice during Angel's initiation into the Circle. However, Hamilton remains wary of the ensouled vampire, suspecting he might yet betray Wolfram and Hart. Hamilton possessed superhuman strength and durability thanks to the ancient power surging in his blood. He was able to withstand a vampire attack (albeit from Harmony) with ease, as well as being able to defeat the weakened Illyria (who was still very formidable). Upon realising that Angel's alignment was still with the forces of good, Hamilton and Angel fought. Initially losing and looking like he was about to be staked, Angel was saved by a timely intervention by his son Connor. Hamilton then knocked Connor out, but revealed that the source of his power is his blood, allowing angel to bite him, consume his blood and gain a power updgrade. He would use his new-found strength to snap Hamilton's neck, killing him.