Allen Lloyd

Allen Lloyd is a psychologist and "sensitivity trainer", hired by the LAPD after Wolfram & Hart accused them of mistreatment against Tony Papazian. He's protrayed by Ron Marasco

In truth, he was a demon worshipper sent by Lee Mercer himself in order to place every officer and detective in Kate Lockley's precint under a curse that would shatter their emotional control, first making them reveal their feelings, but eventually throwing them into total chaos. Mercer and Lloyd's goal was to create a diversion so Papazian would escape and also to humilliate the LAPD, as the effects of the curse would cause them to become violent as well.

Angel tried to stop Lloyd, but fell under his curse as well when he touched Lloyd's "Talking Stick", a cursed wooden stick which he used in his sessions and to which Lloyd was immune.

Trivia

 * In one of many cases of ripoff, Ron Marasco's character in his guest appereance on Charmed was named Allen as well.