Lieutenant Dean was a 24th century Starfleet officer serving aboard the USS Enterprise-D in 2364.

That year, he was Captain Jean-Luc Picard's fencing partner. During one of their bouts, both experienced time distortions caused by the "Manheim Effect" and its creator Doctor Paul Manheim. (TNG: "We'll Always Have Paris")

Dean was portrayed by Dan Kern. His name was given only in the credits.
According to the Star Trek Encyclopedia (4th ed., vol. 1, p. 191), "Lieutenant Dean was named for episode co-writer Deborah Dean Davis."
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