Matthew Marsden

Walden tries to loosen Zooey up by sharing some of Berta’s special brownies.

Walden and Zoey’s relationship suffers after they share a near-death experience. Meanwhile, Alan wonders if Lyndsey has a drinking problem.

When an astronaut, training for a trip to Mars, is mysteriously killed inside a Mars simulation, Castle and Beckett don spacesuits to investigate. But when they discover no one inside…

Ryan intercepts information about a dangerous new weapon coming into the U.S. and asks Nikita to help him prevent its delivery. Nikita learns that the man bringing the weapon into…

Melinda helps an Iraq war veteran deal with the ghosts that he has brought back with him.

When a woman is killed in what looks like a carjacking, the CSIs talk to her husband, the oldest of the three brothers who run their lucrative family business. However,…