The Outer Limits (1995) : 3x9

The Tempest, a rickety old spaceship piloted by space colonists John Virgil and Captain Parker, is on a mission of mercy. It is ferrying two bigwigs from Earth, Dr. Vasquez and Governor Mudry, along with a lifesaving vial of serum to the Tabloss Colony, where an epidemic of Ellysia C is devastating the population. But things go horribly wrong when the ship shifts down from lightspeed and crashes somewhere in space. As he attempts to repair the ship, Virgil is bitten by a strange spider-like creature and passes out. When he awakes, he finds himself sliding between two equally convincing realities. Is he battling for his life against the deadly Ellysia C having already delivered the serum and saved the colony, including his beloved wife and his young son, from certain death? Or is he alive, trapped in a spaceship in the middle of nowhere, with no way out? Or are both realities merely hallucinations, one man's desperate attempt to find hope and heroism in a situation too bleak to face?.