
Acting
Terrence Vaughan Mann (born July 1, 1951) is an American actor, singer and dancer who has been prominent on the Broadway stage for the past three decades.
Description above from the Wikipedia article Terrence Mann, licensed under CC-BY-SA, full list of contributors on Wikipedia.

They Bite!: The Making of Critters
as Self

The Main Course: The Making of Critters 2
as Self

You Are What They Eat: The Making of Critters 3
as Self

Space Madness: The Making of Critters 4
as Self

Freedom
as Barney Fagan

Waking Sleeping Beauty
as Beast (archive footage)

Red Hook
as Lt Fox

Eavesdrop
as August

Shortcut to Happiness
as Art Dealer

The Best Little Whorehouse in Texas
as Sheriff Ed Earl Dodd

Foundation
as Brother Dusk · 30 ep.

Stars in the House
as Self - Special Guest · 1 ep.

Unbreakable Kimmy Schmidt
as Terrence Mann · 1 ep.

Sense8
as Whispers · 24 ep.

The Blacklist
as Harris Van Ness · 1 ep.

Sleepy Hollow
as The Devil · 1 ep.

Smash
as Randy Cobra · 1 ep.

Unforgettable
as Stephen · 1 ep.

The Dresden Files
as Bob · 12 ep.

30 Rock
as Bob Ballard · 1 ep.