"The Passage" is the tenth episode of the third season from the science fiction television series Battlestar Galactica. It aired on December 8, 2006.

The fleet's food supply has been contaminated, forcing everyone to subsist on rapidly dwindling food rations. Athena, who has been doing reconnaissance, discovers a planet where abundant algae is found that can be used as a nutritious, if unappetizing, food source. Unfortunately, the planet is located on the other side of a vast, highly radioactive star cluster that is too big to go around. The fleet must cross the cluster or risk starvation. Because of the size of the cluster, each ship must jump to a point within it before jumping again to the planet.

Admiral Adama proposes that each civilian ship be paired with a Raptor, which will serve as a guide for each ship and direct it safely towards the algae planet. Each pilot is issued a white radiation warning badge which turns solid black when the pilot has been exposed to their maximum safe level of radiation. At that point that pilot is to be pulled off the operation.

Following the strategy meeting, Kat is approached by a disheveled-looking man named Enzo who addresses her as "Sasha", the man tells her she cannot deny who she really is. Enzo continues to harass her, trying to get her to cooperate in some unnamed and apparently criminal activity. It is evident that the two know each other, despite Kat's protestations to the contrary.

Starbuck spies on one of their conversations, questions Enzo and then confronts Kat about what she heard. Kat tearfully admits she was once a "trucker" — a smuggler of drugs and of criminals, and says she stole the identity of a woman who had died just prior to the Cylon attack on the Colonies. Starbuck says one theory behind the success of the Cylon attack was that the Cylons might have infiltrated Caprica with aid from smugglers like Kat.

Deeply shaken by the insinuation she is a traitor, Kat retorts at the time the Colonials didn't know some Cylons had human appearances. If any were Cylons, she wasn't aware, and begs Starbuck not to tell Admiral Adama. Kat tells Starbuck she will tell him herself.

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