Watch Star Trek: The Next Generation Season 4 Episode 21: The Drumhead Online

	IMDB Rating: 8.2/10 from 1,026 votes
	Release: 1991 / Star Trek: The Next Generation / Season 4 / Episode 21
	Genre: Action \| Adventure \| Mystery
	Director: Jonathan Frakes
	Stars: Patrick Stewart, Jonathan Frakes, LeVar Burton
	Synopsis: A Klingon traitor is arrested: engineer Lieutenant J'Ddan, who passed secrets to the Romulans via fluid in a medical syringe, sabotage is feared. Retired female Federation Admiral Satie and her former assistants arrive to take charge of the investigation, with security chief Worf. Meanwhile Data and LaForge look into the sabotage risk. J'Ddan's denial of sabotaging the vital dilithium chamber is credible, which implies another traitor aboard, so the crew is grilled, starting with medic Simon Tarses who gave J'Ddan his injections. After a paranormal counsel believes Tarses a liar, he's tricked by lies into acting guilty, even though the 'sabotage' was in fact found to be an accidental failure, and confesses he lied about his ancestry to hide a Romulan grandfather. Picard objects against the unethical procedure, Satie calls upon Starfleet chief of security Admiral Henry to look for an even wider conspiracy, starting with Picard himself, based on his long-term record, and Worf, based on ...