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"Shades of Gray" is the twenty-second and final episode of the second season of the American science fiction television series Star Trek: The Next Generation, the 48th episode overall. It was originally broadcast on July 17, 1989, in broadcast syndication. It was the only clip show filmed during the series and was created due to a lack of funds left over from other episodes during the season.
Set in the 24th century, the series follows the adventures of the Starfleet crew of the Federation starship Enterprise-D. In this episode, Commander William Riker undergoes medical treatment by Dr. Katherine Pulaski for an alien infection and must relive numerous past events.
It was the final episode written by Maurice Hurley, who originated the idea and wrote the first draft of the script, with Hans Beimler and Richard Manning conducting re-writes. It was directed by Rob Bowman and the framework sequences were filmed over the course of three days. It was watched by 9.8 million viewers on the first broadcast, the highest ratings for the series since "Samaritan Snare" two months earlier. "Shades of Gray" is widely regarded as the worst episode of the series, with critics calling it "god-awful" and a "travesty"; even Hurley referred to it negatively.
It was the last appearance of Dr. Katherine Pulaski. It is also the final episode to regularly feature the original Type A TNG Starfleet uniforms, which were introduced in Season 1.