A fisheries expert is approached by a consultant to help realize a sheik's vision of bringing the sport of fly-fishing to the desert and embarks on an upstream journey of faith and fish to prove the impossible possible.
| Actor | Role |
|---|---|
 Ewan McGregorDr. Alfred Jones | Dr. Alfred Jones |
 Emily BluntHarriet Chetwode-Talbot | Harriet Chetwode-Talbot |
 Kristin Scott ThomasPatricia Maxwell | Patricia Maxwell |
 Rachael StirlingMary Jones | Mary Jones |
 Amr WakedSheikh Muhammad | Sheikh Muhammad |
 Catherine SteadmanAshley | Ashley |
 Tom MisonCapt. Robert Mayers | Capt. Robert Mayers |
 Tom BeardPeter Maxwell | Peter Maxwell |
 Jill BakerBetty | Betty |
 Conleth HillBernard Sugden | Bernard Sugden |
| AAlex Taylor-McDowallEdward Maxwell | Edward Maxwell |
 Peter WightTory Grandee - Angus Butler | Tory Grandee - Angus Butler |
 Hugh SimonForeign Secretary Brian Fleet | Foreign Secretary Brian Fleet |
 Otto FarrantJoshua Maxwell | Joshua Maxwell |