| 角色 | 饰演者 | 角色介绍 |
| Dr. Simon Hill (13 episodes 2011) | 卢克·梅伯利 | |
| Sean Kelly? (13 episodes 2011) | Gord Rand | |
| Rebecca Kincaid? (13 episodes 2011) | 米歇尔·波斯 | |
| Captain Bobby Trang? (13 episodes 2011) | 特瑞·陈 | |
| Xavier Marks (13 episodes 2011) | 伊莱亚斯·科泰斯 | |
| Commander Will Royal? (13 episodes 2011) | Arnold Pinnock | |
| Major Pedersen (13 episodes 2011) | 黛博拉·卡拉·安格 | |
| Talwar Mehra (13 episodes 2011) | Karan Oberoi | |
| Larry Alexander (7 episodes 2011) | Gerry Morton | |
| Major Glad Marin (5 episodes) | Daniel DeSanto | |
| Terrel Ford (3 episodes 2011) | Dwain Murphy | |
| Hasti Samizay (2 episodes 2011) | Anne Nahabedian | |
| Captain Pam Everwood (2 episodes 2011) | Lisa Berry | |
| Vans (2 episodes 2011) | Hamza Jeetooa | |
| Hannah Corday (2 episodes 2011) | Trenna Keating | |
| Fahran Nawabi? (2 episodes 2011) | Farzad Sadrian | |
| Ariel Garamond (2 episodes) | Christina Cox |
