The leading committee all gathering around a computer.

Lt. Brice and Lt. Lane are staring at a computer being used by Eva.

Lt. Garnet staring at a computer being used by Eva.

Dr. Cat Brandice considering her future on the ship.

Cosmo Kay as Nathan Stark, Miloš Cvetković as Sasha Novak sitting with the rest of the crew.

Dr. Brandice sitting on steps, waiting with the rest of the crew.

Lt. Garnet Shaking Hands with Lt. Lane in a rare moment of peace.

Lt. Lane shaking hands with Lt. Garnet, in a rare moment of peace.

Eva and Lt. Garnet on a computer trying to get some work done.

Felix, sitting with his electronic, trying to figure out who the murderer is.

A radiation leak causes a major crisis on The Ark. "One Step Forward, Two Steps Back" is the fifth episode of the show's first season.