All 79 actors in both Arrow and Stargate Atlantis
79 actors have appeared in both Arrow and Stargate Atlantis, across 270 episodes. The most-credited is David Nykl, Anatoly Knyazev in Arrow and Dr. Radek Zelenka in Stargate Atlantis.
| Actor | In Arrow | In Stargate Atlantis | Eps | Eps |
|---|---|---|---|---|
| David Nykl | Anatoly Knyazev | Dr. Radek Zelenka | 36 | 54 |
| Christopher Heyerdahl | Damien Darhk Cut-Out | Wraith Leader (Todd), Halling, Male Wraith | 1 | 22 |
| Mike Dopud | Viktor | Kiryk | 6 | 1 |
| Ryan Robbins | Conklin | Ladon Radim | 9 | 5 |
| Dylan Neal | Dr. Anthony Ivo | Dave Sheppard | 10 | 1 |
| Garwin Sanford | Justin Claybourne | Simon Wallis | 1 | 3 |
| Chelah Horsdal | Kate Spencer | Erran | 5 | 1 |
| Kirby Morrow | Matt Itsook | Daedelus Tech, Captain Dave Kleinman | 1 | 8 |
| Dean Marshall | Emergency Services | Sgt. Bates | 1 | 10 |
| Janina Gavankar | McKenna Hall | Sgt. Mehra | 4 | 1 |
| Patrick Sabongui | Captain David Singh, Soldier #2, Street Dealer | Kanaan, Taliban Guard | 5 | 5 |
| Ben Cotton | Dave Hackett | Dr. Kavanagh | 1 | 6 |
| Agam Darshi | Anastasia | Athosian, Novo | 1 | 2 |
| Dexter Bell | Gangbanger #2, Released Criminal, Security Guard | Sgt. Barraso | 3 | 1 |
| Donna Soares | SCPD Detective | Coleman | 1 | 3 |
| Jeffrey C. Robinson | Deathstroke, Beta Unit Soldier | Male Wraith, Wraith Pilot | 5 | 2 |
| Artine Brown | Hendrick Von Arnim | Trader | 3 | 1 |
| Christina Cox | Mayor Celia Castle | Major Anne Teldy | 3 | 1 |
| Doug Chapman | Baker, Soldier #1 | Sgt. Cole | 3 | 1 |
| Ron Selmour | The Butcher | Jannick | 4 | 1 |
| Sean Rogerson | Peter | Nevik | 3 | 1 |
| Brahm Taylor | Jay Reimsdyk | Lathan | 2 | 2 |
| Paul Lazenby | Inmate, Mr. Robbins, Thug | Genii Soldier | 3 | 1 |
| Kyra Zagorsky | Athena | Ara | 2 | 1 |
| Ryan Booth | Peter Yorke | Lt. Negley | 2 | 1 |
| Josh Blacker | Magee | Screaming Man | 1 | 1 |
| Aleks Paunovic | Felton | Rakai | 2 | 1 |
| David Quinlan | Reporter #4 | Ancient Scientist | 2 | 1 |
| Carmen Moore | Mina Fayad | Reporter | 3 | 1 |
| Brian Ho | Transit Guard | Stunt Creature | 1 | 1 |
| Christopher Pearce | Merlyn Security #1 | Marine Williams | 1 | 1 |
| Colin Corrigan | Volunteer | Guard #2, Team Member | 1 | 2 |
| Colin Decker | Pilot | Marine/Pilot | 1 | 2 |
| Curtis Caravaggio | Eddie Walczak | Major Elliot Rutherford | 1 | 1 |
| David Bloom | FBI Boss | Eldred | 1 | 1 |
| Glenn Ennis | Ankov | 1st Warrior | 1 | 1 |
| Nels Lennarson | Anson | Holland | 1 | 1 |
| Noel Johansen | Attorney | Dr. Dickenson | 1 | 1 |
| Yee Jee Tso | Scientist | Technician | 1 | 2 |
| Craig Fraser | Armed Guard, Soldier | Atlantis Security Officer, Pilot | 2 | 2 |
| Nickolas Baric | Nathan Sierra, Thug #1, Vincent Steelgrave | Hester | 3 | 1 |
| Robert Wolfgang Weiss | Court Clerk | Scientist | 2 | 1 |
| John Shaw | George Wolfman | Garth | 1 | 1 |
| Johnny Cuthbert | John Byrne | Fortnum | 1 | 1 |
| Michael Cram | Malcolm's Friend | Silas | 1 | 1 |
| Noah Beggs | Drunk Guy | Dex | 1 | 1 |
| Patrick Gilmore | Erlich Kelso | Genii Soldier | 1 | 1 |
| Yurij Kis | Oleg | Local | 1 | 1 |
| Adam Lolacher | Klaus Markos | Genii Man | 1 | 1 |
| Bruce Dawson | US Ambassador | Captain | 1 | 1 |
| Darren Dolynski | Dr. Webb | Mirellus | 1 | 1 |
| Karin Konoval | Dr. Vaca | Second in Command | 1 | 1 |
| Tobias Slezak | James Holder | Myrus | 1 | 1 |
| Woody Jeffreys | Prison Guard | Bouncer | 1 | 2 |
| Andrew Hedge | Guard, Pit Boss | Soldier | 2 | 1 |
| Mark Gibbon | Ops Leader | Constable | 1 | 1 |
| Ona Grauer | Vivian | Female Ancient | 1 | 1 |
| Reese Alexander | Lieutenant | Major Jordan | 1 | 1 |
| Richard Stroh | Security Guard #1 | Genii Soldier | 1 | 1 |
| Steven Culp | Senator Joseph Cray | Henry Wallace | 1 | 1 |
| James Bamford | Gunman #2 | Wraith | 1 | 1 |
| Peter Graham-Gaudreau | Brett Collins | Arja | 1 | 1 |
| Kory Grim | Recruit #2, Sentry | Recruit | 2 | 1 |
| Daniel Boileau | Kirby Bates | Cocoon Victim | 1 | 1 |
| Ernest Jackson | Driver | Replicator | 1 | 1 |
| Jeremy Jones | Gun Dealer | Edison | 1 | 1 |
| Terry Howson | Cronan | Kell | 1 | 1 |
| Daniel Bacon | Reporter | Dr. Watson | 1 | 1 |
| David Milchard | Nelson Ravich | SGC Technician | 1 | 1 |
| Emy Aneke | Untouchable #2 | Lt. Morrison | 1 | 1 |
| Kimani Ray Smith | Gangbanger #1 | Dr. Lindstrom | 1 | 1 |
| Lauro Chartrand | Thug | Genii Soldier | 1 | 1 |
| Chris Nowland | Partner | Crime Scene Guy | 1 | 1 |
| Christian Sloan | Dealer | Hybrid | 1 | 1 |
| Jason Diablo | Jermaine Fisher | Guard | 1 | 1 |
| Joel Cottingham | Prisoner #2 | Doctor | 1 | 1 |
| Simon Longmore | Bratva Pakhan | Tathal | 1 | 1 |
| Patricia Cullen | Carmen Guzman | Replicator Crew Member | 1 | 1 |
| Shaw Madson | Parole Officer | Matthews | 1 | 1 |
Cast data from TVmaze, licensed CC BY-SA 4.0.