The true story of parents who discover that their two young daughters have a genetic disease that makes it fatal for them to be exposed to ordinary light.
| Actor | Role |
|---|---|
 Peter HortonJim Harrison | Jim Harrison |
 Tracy PollanKim Harrison | Kim Harrison |
 Roy DotriceDr. Burnham | Dr. Burnham |
 Bill SmitrovichMilos Janecek | Milos Janecek |
 Natalija NogulichStanja Janecek | Stanja Janecek |
 Eric PierpointDr. David Tanner | Dr. David Tanner |
 Sam HorriganBobby Harrison | Bobby Harrison |
 Lindsey HaunJamie Harrison | Jamie Harrison |
| AAnnalise AshdownSherry Harrison | Sherry Harrison |
 Mary Pat GleasonLydia Fallbrook | Lydia Fallbrook |
 Ramon BieriT. Hardy Fallbrook | T. Hardy Fallbrook |
 Annie CorleySusan | Susan |
 Lenore KasdorfPeggy | Peggy |
 Glenn MorshowerTrooper | Trooper |
| KKenneth WhiteMr. Dorfman | Mr. Dorfman |
 Virgil FryeService Station Owner | Service Station Owner |
| DDaniel CollinsHarley | Harley |
 Thomas KopacheArlo Trask | Arlo Trask |
 Lois de BanzieSecretary | Secretary |
 Victor DiMattiaBert | Bert |
 Adam HendershottSkip | Skip |
 Bradley PierceLittle Boy | Little Boy |