| Name | Character | Episodes |
|---|---|---|
| Richard Armitage | Matthew Nolan | 6 |
| Jing Lusi | Hana Li | 6 |
| Lesley Sharp | Director General Delaney | 6 |
| Mido Hamada | Mike Maxwell | 6 |
| Thomas Chaanhing | Captain Chén | 6 |
| Aidan Cheng | Co-Pilot Wú | 6 |
| Jonathan Aris | John Tennant | 5 |
| Parker Sawyers | Eric Jones | 4 |
| Daphne Cheung | Ruan Yué | 4 |
| Zoe Telford | Amber Hurst | 3 |
| Oliver Maltman | Steven Hurst | 3 |
| Rick Warden | Chris Peele | 3 |
| David K.S. Tse | Aìguó Táng | 3 |
| Peter Guinness | George Chapman | 2 |
| Maria Rivera | Cohen | 2 |
| Jack Colgrave Hirst | Doyle | 2 |