
Acting
Jack has appeared in over 60 feature films, including Men in Black II. One of his most memorable performances was in film Love Liza as Denny, an energetic radio control hobbyist trying to help Philip Seymour Hoffman's character come to terms with the suicide of his wife. He also had a brief but memorable role in The Big Lebowski as The Dude's (Jeff Bridges) landlord.
He guest starred in the Star Trek: Deep Space Nine episode "Babel", and in the Angel episode "Long Day's Journey". In 1995 he played Mr. Chase in the Babylon 5 episode "Comes the Inquisitor".
Description above from the Wikipedia…

The Platinum Loop
as Ben Malton

Father Stu
as Curtis

Zeroville
as Studio Art Director
That Guy... Who Was In That Thing 3: Trek Stars
as Self

In Dubious Battle
as Dr. Burton

A Winter Rose
as Mel Wieser

The Sound and the Fury
as Earl

The Heyday of the Insensitive Bastards
as Sheriff Mallon

A Walk in Winter
as Sheriff Mallon

Lost on Purpose
as Barry Kitchanski

Love, Victor
as Landlord · 1 ep.

Lethal Weapon
as Sam Fisher · 1 ep.

The Man in the High Castle
as Harlan Wyndam-Matson · 4 ep.

The Magicians
as Clock Dwarf · 1 ep.

Franklin & Bash
as 'Gentleman' Jim Sweeney · 1 ep.

NCIS: Los Angeles
as Shop Owner · 1 ep.

The Mentalist
as Playland Owner · 1 ep.

Mad Men
as Morris Mann · 1 ep.

The New Adventures of Old Christine
as Scalper · 1 ep.

Bones
as Malaki Wallace · 1 ep.
Pineapple Express
2008