The Exodus: Part 1 (S03E16)

In a satellite monitoring station, a military officer calls Dr. Jariabek (Krzysztof Pieczynski) to inform him that a radiation-emitting pulsar is heading toward Earth. Before she can finish, however, someone sticks a needle in her neck and then injects himself with the fluid. The Sliders land in a city besieged by looters, as defense sirens wail. They come across a vagrant, who blames the Russians. Apparently, the Cold War has not ended in this dimension. Suddenly, a car races around the corner, flipping and exploding. The Sliders try to rescue the driver, who mumbles something about a trajectory being wrong. As he dies, the Sliders notice blood seeping from a gunshot wound. Arturo (John Rhys-Davies) recognizes the man as Dr. Jariabek, a noted cosmologist. Another car pulls up, and Captain Maggie Beckett (Kari Wuhrer) and two soldiers jump out with guns drawn, demanding to know if Jariabek said anything. (iTunes)