| A pair of detectives investigate stalkers in Los Angeles. Strong and focused, Lt. Beth Davis is an expert in the field of repeated harassment, driven by personal experience of being a victim. She heads the LAPD's Threat Assessment Unit, which investigates cases of stalking -- including voyeurism, cyberharassment and romantic fixation. The history of recent transfer Jack Larsen -- whose personality and questionable behavior have been an issue in the past -- may help him in his assignment to her team. Her other detectives are young but eager Ben Caldwell and deceptively intelligent Janice Lawrence. Together they try to stop situations from spinning out of control -- and to keep their personal obsessions at bay. |
| Name | Character | Episodes |
|---|---|---|
| Maggie Q | Beth Davis | 20 |
| Elisabeth Röhm | Amanda Taylor | 20 |
| Dylan McDermott | Jack Larsen | 20 |
| Mariana Klaveno | Janice Lawrence | 20 |
| Victor Rasuk | Detective Ben Caldwell | 20 |
| Gabriel Bateman | Ethan Taylor | 8 |
| Eion Bailey | Ray Matthews | 6 |
| Tara Summers | Tracy Wright | 6 |
| Warren Kole | Trent Wilkes | 5 |
| Chelsea Harris | Belle | 5 |
| Mira Sorvino | Vicki Gregg | 4 |
| Kristoffer Polaha | Nathan Grant | 2 |
| Adam Kaufman | Will | 2 |
| Kathryn Taylor Smith | Sid Tech | 2 |
| Ashley Johnson | Stephanie Beekman | 1 |
| Raphael Sbarge | Drew Summers | 1 |
| Phoebe Tonkin | Nicole Clark | 1 |
| Jessica Camacho | Eva Bowen | 1 |
| Andrew W. Walker | Coach Baker | 1 |
| Kat Graham | Christine Harper | 1 |
| Sara Paxton | Isabelle Martin | 1 |
| AnnaLynne McCord | Nina Preston | 1 |
| Marc Blucas | Mark Richards | 1 |
| Heather Matarazzo | Emily | 1 |
| Teo Briones | Landon Richards | 1 |
| Todd Giebenhain | Sam | 1 |
| Torrey DeVitto | Kate Edwards | 1 |
| Ariel Llinas | FBI Agent | 1 |
| Patricia Bethune | Hazel | 1 |
| Matt Roth | Dr. Roger Chase | 1 |
| Evan Holtzman | Pete | 1 |
| Burl Moseley | Bill | 1 |
| Marieh Delfino | Nora Garcia | 1 |
| Don Harvey | Ken Buck | 1 |
| Sam Page | Mike Harris | 1 |
| Sam Witwer | Jamie Tolliver | 1 |
| Vedette Lim | Shelly Walker | 1 |
| Michael Rady | Dave Knox | 1 |
| Sammi Hanratty | Hanna McCoy | 1 |
| Jamie McShane | Gene Meadows | 1 |
| Jason Wiles | Tom Wade | 1 |
| Molly Hagan | Nancy Dalton | 1 |
| Michael Landes | Abraham | 1 |
| Samaire Armstrong | Lucy | 1 |
| Nicholle Tom | Zoe Parsons | 1 |
| Chandra West | Cynthia Wheeler | 1 |
| Sofia Vassilieva | Dierdre | 1 |
| Alex Carter | Kenneth Brown | 1 |
| Caity Lotz | Melissa Barnes | 1 |
| Jessica Tuck | Andrea Brown | 1 |
| Eric Lange | Larry Meyers | 1 |
| Audrey Wasilewski | Ellen Meyers | 1 |
| Scott Michael Campbell | Eddie Gaines | 1 |
| Andrea Roth | Elaine Hayes | 1 |
| Melanie Liburd | Lori Carter | 1 |
| Sage Kirkpatrick | Rosemary Wilson | 1 |
| T.V. Carpio | Robyn | 1 |
| Lyndon Smith | Laurie | 1 |
| Matthew Alan | Zack Thomas | 1 |
| Michael Cassidy | Brian Mitchell | 1 |
| John M. Jackson | Douglas Jeffries | 1 |
| Michael Irby | Silas Martin | 1 |
| Deborah Van Valkenburgh | Eleanor | 1 |
| David Chisum | Chris Powell | 1 |
| Laurie Fortier | Stella | 1 |
| David Anders | Darren Tyler | 1 |
| Meagan Tandy | Annie | 1 |
| A Leslie Kies | Cori James | 1 |
| Ian Reed Kesler | Paul | 1 |
| Tiffany Hines | Skye | 1 |
| Rebecca Tilney | Dr. Mott | 1 |
| Brett Cullen | Will Hayes | 1 |
| Shanola Hampton | Pam Tyler | 1 |
| J. D. Pardo | Oscar Ramirez | 1 |
| Louis Herthum | Jimmy Lambert | 1 |
| Lee Garlington | Diane Kindrick | 1 |
| Brendan Sexton III | Robbie Dalton | 1 |
| Jake Weary | Bobby Hughes | 1 |
| Chasty Ballesteros | Sophia Mason | 1 |
| Darri Ingolfsson | Chad Hewitt | 1 |
| Jay Karnes | Dr. Paul Lewis | 1 |
| Wes Ramsey | Jason Walker | 1 |
| Lesley Fera | Mrs. McCoy | 1 |
| Mouzam Makkar | Terry Holt | 1 |
| Nazneen Contractor | Adele Marshall | 1 |
| Madeline Brewer | Claudia Burke | 1 |
| Michael Grant Terry | Kurt Wild | 1 |
| Rachael Carpani | Kristin Patterson | 1 |
| Caitlin Carver | Alexis | 1 |
| Alex Fernandez | Frank Santos | 1 |
| Andrea Bogart | Laura Flemming | 1 |
| Jessica Pohly | Wanda | 1 |
| Chloe Lanier | Sage | 1 |
| Ryan Devlin | Cedric Brown | 1 |
| Christina Vidal | Christina Richards | 1 |
| Kate Norby | Vanessa Lewis | 1 |
| Jay Hayden | Clay Adams | 1 |
| Erin Daniels | Lauren / Candice | 1 |
| Assaf Cohen | Oliver Granzinger | 1 |
| Merle Dandridge | Dean Lisa Miner | 1 |
| Leonardo Nam | Howard Granger | 1 |
| Kerr Smith | John Bardo | 1 |
| John Brotherton | Scott Mason | 1 |
| Kevin Christy | Louis Atwood | 1 |
| Kevin Sizemore | Greg Miner | 1 |
| Scott Michael Morgan | Frank | 1 |
| Marco Dapper | Richard | 1 |
| Robert Alan Beuth | Ron | 1 |
| Craig Gellis | Clark Jennings | 1 |
| Sadie Stratton | Francine Johnson | 1 |
| Lauren Bowles | Monica Grant | 1 |
| David L. King | Schneider | 1 |
| Gerald Webb | Doorman | 1 |
| Troy Blendell | Thaddeus Barnes | 1 |
| Angela Gulner | Alice Vargas | 1 |
| Con Schell | Randy | 1 |
| Stefan Marks | Peter Daniels | 1 |
| Cole Bernstein | Jenny Kline | 1 |
| David Julian Hirsh | Keith Bradshaw | 1 |
| Chad Addison | Max Lupton | 1 |
| Benjamin Papac | Craig Hayes | 1 |
| Ross Mackenzie | Derek | 1 |
| Alano Miller | Troy Gunn | 1 |
| Beth Kennedy | Ann | 1 |
| Kim Estes | Detective Doug Baer | 1 |
| Cherilyn Wilson | Cara Lambert | 1 |
| Jennifer Parsons | Barbara James | 1 |
| Daren Kagasoff | Eric Bates | 1 |
| Brian Dare | Sound Guy | 1 |
| Roy Vongtama | Sales Clerk | 1 |
| Leyna Nguyen | News Reporter | 1 |
| Sarah Benoit | Elderly Lady | 1 |
| Austin Lyon | Tripp | 1 |
| Hector Luis Bustamante | Juan Vasquez | 1 |
| Evan Arnold | Dr. Phillip Jacobs | 1 |
| Bret Green | Barry Jacobs | 1 |
| B.J. Clinkscales | Delivery Guy | 1 |
| Ellie Araiza | Mary | 1 |
| Thomas Robie | Tim | 1 |
| Sterling Beaumon | Ian Hemingway | 1 |
| Brad Schmidt | Matt Marshall | 1 |