Bill Erwin
Bill Erwin  was the actor who portrayed Doctor Dalen Quaice in the  fourth season episode .

A veteran of film and television, Erwin appeared on numerous "theater programs" of the early 1950s, including Science Fiction Theater and Zane Grey Theatre. He made guest appearances on a wide variety of television programs, including The Virginian, Gunsmoke, Growing Pains, Who's the Boss?, Seinfeld (for which he received an Emmy nomination, with Lanei Chapman playing his housekeeper), The Drew Carey Show, The West Wing, I Love Lucy, and The Twilight Zone. In the latter, he co-starred with fellow Trek alumni Ken Lynch, Arthur Batanides, Frank Overton, John Hoyt, and Morgan Jones.
 
His film credits consist primarily of small roles in such films as Forces of Nature, Naked Gun 33 1/3: The Final Insult (with Marc Alaimo), Home Alone, She's Having a Baby (with William Windom and Wil Wheaton), and The Bear. The exception to this is Somewhere in Time, where he was featured in a larger role alongside , , and  actor Christopher Plummer.

He had roles in two films with  actor Christopher Lloyd: Dennis the Menace (with Paul Winfield) and Things to Do in Denver When You're Dead (with Bill Cobbs, Don Stark, Tommy "Tiny" Lister, Jr., and Bill Bolender). Erwin also appeared in the HBO movie Menno's Mind, starring Michael Dorn, Robert Picardo, and Corbin Bernsen.

Among his last known work were episodes of Monk (2003, with James W. Jansen), King of Queens (2004), Everwood (2004, with Michael Behrens), and My Name Is Earl (2006, with Larry A. Hankin and Arne Starr).

Erwin died at his home in Studio City, California, on 29 December 2010. He was 96 years old.  Erwin was remembered at the 63rd Primetime Emmy Awards on 18 September 2011.

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Performers
TNG performers