A human subspace theorist and husband of the Vulcan scientist T'Pan, who attends the test of Reyga's metaphasic shield aboard the Enterprise-D in 2369.
Doctor Christopher is a human scientist. He appears in the episode Suspicions, played by John S. Ragin.
He travels with his wife, T'Pan, to the Enterprise at Beverly Crusher's invitation. They are there to watch a Ferengi scientist, Reyga, show off a shield meant to protect a shuttle inside a star. Christopher is more easy-going than his wife but shares her doubts about work that has not been properly reviewed.
When the trial flight appears to end in the pilot's death, he is among those who conclude that the shield has failed. After Reyga dies as well, Crusher questions each of the guests. Christopher and T'Pan resent it. Neither had anything to do with the death, which was the work of the pilot Jo'Bril.