David 26 May 2006 from the hollywood reporter New shifts for Lawson, O'Loughlin By Nellie Andreeva Maggie Lawson has been named a regular on USA Network's upcoming series "Psych." Meanwhile, Australian actor Alex O'Loughlin has joined the cast of FX's cop drama "The Shield." "Psych" centers on Shawn Spencer (James Roday), an amateur detective who cons the police into believing he has psychic powers that help him solve crimes. Lawson plays junior Detective Juliet O'Hara, the new partner of head Detective Roland Lassiter (Tim Omundson). Lawson originally was cast in the project as a guest star because of her commitment to ABC's midseason comedy series "Crumbs." The actress, whose credits also include ABC's series "It's All Relative" and the network's telefilm/pilot "Nancy Drew," is repped by Ro Diamond and Susie Schwarz at SDB Partners and Ellen Meyer Management. O'Loughlin will play Kevin Hiatt, a new member of Detective Vic Mackey's (Michael Chiklis) strike team. He will fill the void of the departure of Kenny Johnson, whose character, Detective Lemonhead Lemansky, died in the series' fifth-season finale.