as Rudy and Mark Pellegrino as Rita's abusive ex-husband Paul. Jaime Murray portrayed Lila Tournay in season two, a physically attractive but unhinged British artist who becomes obsessed with Dexter. Keith Carradine, as Special FBI Agent Frank Lundy, and Jimmy Smits, as ADA Miguel Prado, each appeared in season-long character arcs in seasons two and three, respectively. David Ramsey, who plays confidential informant Anton Briggs in season three, returned in season four, becoming romantically involved with Debra Morgan. John Lithgow joined the cast in season four as the "Trinity Killer". Carradine returned in season four, reprising his role as newly retired FBI Special Agent Frank Lundy, who was hunting the Trinity Killer. Courtney Ford was featured in season four as an ambitious reporter who mixes business with pleasure, getting romantically involved with Quinn while simultaneously fishing for sources and stories. Julia Stiles joined the cast in season five as Lumen Pierce, a woman who gets involved in a complex relationship with Dexter after the tragedy that culminated the previous season. Season five also had Jonny Lee Miller cast as the motivational speaker Jordan Chase, Peter Weller cast as Stan Liddy, a corrupt narcotics cop, and Maria Doyle Kennedy cast as Sonya, Harrison's nanny. In season six, Mos Def was cast as Brother Sam, a convicted murderer turned born-again Christian, and Edward James Olmos and Colin Hanks guest-starred as Professor James Gellar and Travis Marshall, members of a murderous apocalyptic cult. Seasons seven and eight featured multiple guest stars, including Ray Stevenson as Ukrainian mob boss Isaak Sirko, a man with a personal vendetta against Dexter; Yvonne Strahovski as Hannah McKay, the former accomplice of a spree killer; Jason Gedrick as strip club owner George Novikov, also part of the mob; and Charlotte Rampling as Dr. Evelyn Vogel, a neuropsychiatrist who takes an interest in Dexter; Ronny Cox as the Tooth Fairy killer; Sean Patrick Flanery as Jacob Elway, a private investigator who Debra works for. Margo Martindale had a recurring role as Camilla Figg, a records office worker who was close friends with Dexter's adoptive parents. JoBeth Williams portrayed Rita's suspicious mother, Gail Brandon, in four episodes of season two. Anne Ramsay portrayed defense attorney Ellen Wolf, Miguel's nemesis. Valerie Cruz played a recurring role as Miguel's wife, Sylvia. In season six, Billy Brown was cast as transferred-in Detective Mike Anderson to replace Debra after her promotion to lieutenant. Josh