Question:
Who are they? Cole.
Answer:
Cole Turner once was half-human (that would be Cole) and half-demon (the "upper-level" mercenary Belthazor), sent by the Triad to kill the Halliwells. He fell in love with Phoebe, and killed the Triad instead. Then, his demonic half was vanquished, leaving him bereft of supernatural powers. Then, Debbi Morgan stopped by the Manor and made him The Source Of All Evil. Then, he married Phoebe in a "dark" ceremony. Then, the gals vanquished his entire ass. Then, he returned from the dead as some sort of scary demonic psycho stalker, determined to drag Phoebe back into marital bliss no matter the cost. Does all this seem confusing, ridiculous, contrived, tiresome, and lame? Try recapping it, honey.
Played by: Julian McMahon, an actor of Australian extraction whose most recent role on an American television series was in the NBC psychodrama Profiler. While desperately attractive, Mr. McMahon has displayed questionable taste in women, having once been married to Dannii Minogue.