
Acting
Nelson has appeared in the Broadway productions of Angels in America (2018), Cabaret (2016), After the Fall, The Invention of Love, Three Sisters, Picasso at the Lapin Agile (Obie Award), A Few Good Men, Rumors, Broadway Bound, Biloxi Blues, Brighton Beach Memoirs, and Amadeus. He teaches theater at Princeton University and HB Studio in New York, where he studied acting with Uta Hagen.
- IMDb Mini Biography By: Mark Nelson

The Evil Three
as Darryl Wells

Lingua Franca
as Roman

Blue Pig
as Father

The Rewrite
as Josh

The Invention of Love
as Chamberlain

The First Wives Club
as Eric Loest

The Seventh Coin
as Librarian
Largo Desolato
as Bertram

Bloodhounds of Broadway
as Sam the Skate
Nothing Personal

Julia
as Dr. Greenberg · 1 ep.

Unforgettable
as Eugene Lustig · 1 ep.

Castle
as Hot Shot · 1 ep.

The Good Wife
as Adam Englehardt · 1 ep.

Law & Order: Criminal Intent
as Mancuso · 1 ep.

CSI: Crime Scene Investigation
as Audience Member · 1 ep.

Ed
as Sid Pennington · 1 ep.

Law & Order: Special Victims Unit
as Robert Stevens · 1 ep.

Now and Again
1 ep.

Liberty!
as Loyalist · 6 ep.