David Boreanaz

played Angel in Angel

Angel, portrayed by David Boreanaz, is a vampire cursed with a soul by gypsies during the 1800s in Romania. Beforehand, he was Liam, a drunkard to his father and turned into a vampire by Darla in the 1700's. Then, he became Angelus, one of the worst vampires to walk the earth.

But now, Angel is in Los Angeles after being alongside his now ex-girlfriend Buffy in Sunnydale for three years. He came to make atonement for his past life by helping the helpless in Los Angeles. He formed Angel Investigations and tries to solve cases in the city.
played Special Agent Seeley Booth in Bones

Seeley is a long and dedicated agent of FBI. He often gets the the cases where the victim is nothing more that skin and bones because of his relationship with forensic anthropologist, Dr. Temperance Brennan. They work very well together, she wants closure for the victim and he wants the criminal. As he has told others, 'This is the only job'.
played Angel [Season 1-3] in Buffy the Vampire Slayer

Angel is a vampire with a soul. He was sired by Darla in 1753, after which he roamed around Europe killing and causing mayhem wherever he went. During which time he sired Drusilla and trained Spike. At the end of the nineteenth century he killed a member of a gypsy tribe, and the tribe got its revenge by restoring his soul. He wandered around America for years, in a state of pity and remorse, before he was persuaded to join the fight against evil. He went to Sunnydale to help the new Slayer (Buffy) and quickly fell for her. The two fell in love, but when they consumated their relationship the curse was lifted and Angel's soul was removed again. Angel then went about tormenting Buffy and her friends, before trying to destroy the world. In order to stop the destruction of the world, Buffy was forced to kill Angel. However partway through series 3 Angel was returned to Earth, where he again started a relationship with Buffy. But he decided that they couldn't pursue it because they were both so different and could never lead a proper life together. So Angel left Sunnydale and headed to LA, where he continued the fight against evil.