| Stephen Amell | Oliver Queen /
The Arrow |
| Katie Cassidy | Laurel Lance /
Black Canary |
| David Ramsey | John Diggle |
| Willa Holland | Thea Queen |
| Emily Bett Rickards | Felicity Smoak |
| Colton Haynes | Roy Harper |
| John Barrowman | Malcolm Merlyn |
| Paul Blackthorne | Quentin Lance
(credit only) |
| Brandon Routh | Ray Palmer /
The Atom |
| Matt Nable | Ra's al Ghul |
| Audrey Marie Anderson | Lyla Michaels |
| Katrina Law | Nyssa al Ghul |
| Karl Yune | Maseo Yamashiro /
Sarab |
| Rila Fukushima | Tatsu Yamashiro |
| Marc Singer | General Matthew Shrieve |
| Neezar Joseph | Sentry |
| Kristopher Nielsen | A.R.G.U.S Tech
(as Kristopher Nielson) |
| Brandon Nomura | Akio Yamashiro |