- Annie Ilonzeh - Julia Marcus
- Mick O'Rourke - Mikhail Vostrov
- Patricia Kalember - NCS Director
- Floriana Lima - Michelle Prado
- Robert John Burke - Special Agent Brock
- Pasha D. Lychnikoff - Vaso Matiashvilli
- David Vadim - Arkady Isakof
- Fred Thompson - FBI Director
- Ned Van Zandt - CIA Director
- Joy Franz - Maureen Tilden
- Randall Batinkoff - Steven Gallagher
- Billy Calder - Richie Diberno
- Roman Roytberg - Roman
- Paul Ben-Victor - Special Agent Faber
- Haaz Sleiman - Scott Tolliver
- Natalia Kiriya - Svetlana
- Aleksander Mici - Oleg Zhulov
- Francesco Martino - Serdar
- Carole Demas - Secretary to Branch Chief
- Victor Verhaeghe - Chief of Crime Scene Unit
- Jonathan Seymour - FBI Agent
- David Weiss - CIA Security Officer Adam Noraz
- Brian Munn - Radiograph Operator
- Victor Joel Ortiz - NYPD Officer
- Julee Cerda - FBI Agent at Field Office
- Robert O'Gorman - Pharmacist
- Nathan Ramos - Attendant
- Stephen Brown - KGB Agent
- Samuel J. Joseph - Rag Holding Attendant
- Rajeev Pahuja - NYPD Detective
- Campbell Scott - Mysterious Date
- Jakob von Eichel - SVR Technician
- Lolita Foster - FBI ERT Tech
- Todd Cerveris - Senior Engineer
- Vadim Kroll - SVR DAT Member #3
- Ivan Goris - Undercover Cop
- Brenda Kuciemba - Pedestrian
- Marmee Regine Cosico - ND Pedestrian
- Cliff Moylan - Cop #2
- Paul Juhn - Stone and Tile Clerk
- Sarah Grace Wilson - Little Girl's Mother
- Jamie Hodge - Restaurant Patron
- Loukas Papas - Agent 1
- Danny Plaza - Philadelphia Police Officer
- Dave T. Koenig - Septa Worker
- Dave Ferrier - Spectator
- John Mitchell - City hall Tourist
- Shawn Shillingford - Reporter
- Brian Anthony Wilson - Maintenance Man
- Patsy Meck - Docent
- Евгения Оруджева - SVR Maid
- Евгения Оруджева - Maid #1
- Izzy Ruiz - Market Vendor
- Mia Vallet - Rebecca Saunders
- Joseph D'Onofrio - Security Guard
- Alan Cappelli Goetz - Bartender
- Doris McCarthy - Neighborhood Lady
- Hassani Shapi - Fadi
- Giancarlo Esposito - Oscar Christoph
- Antonio De Matteo - Endo
- Michael Schermi - Souvenir Salesman
- Amelie McKendry - German Oktoberfest Waitress
- Matthew Humphreys - Brad Davis
- Leslie Silva - Jane Abbott
- Chester Jones III - Cop #2
- Lorrie Odom - 911 Operator
- Ian Paola - Cop #1
- Mike Dopud - Timur
- Diane Farr - Elizabeth
- Brian Smyj - SVR Assassin
- Andrea Sooch - Concierge
- Dillon Mathews - Summit Attendant
- James Zeiss - Pedestrian
- Michael Filipowich - Uri Adulov
- Stan Demidoff - Suited Man #1
- Jasson Finney - Guard #1
- Stephen Mendel - Priest
- Pun Bandhu - Doug Peters
- Catherine A. Callahan - Clara
- Ed Moran - Lundgren
- Jesse VanDerveer - Kid on Bike
- Avi Nir
- Ron Leshem
- Amit Cohen
Giancarlo Esposito hace el papel de Oscar Christoph.
Hope Davis interpreta a Katya O'Connor en la serie.
Scott Cohen hace el papel de Mark O'Connor.
Margarita Levieva interpreta a Natalie O'Connor en la serie.
Gavin Stenhouse interpreta a Alex O'Connor en la serie.
Morgan Spector interpreta a Victor Dobrynin en la serie.
Kenneth Choi hace el papel de Sam Luttrell.
Alexandra Peters interpreta a Sarah O'Connor en la serie.
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