Career

Gallagher is best known for his television roles as Det. Joe Finn in Da Vinci's Inquest

Da Vinci's Inquest

Da Vinci's Inquest is a Canadian dramatic television series that aired on CBC Television from 1998 to 2005. Seven seasons of thirteen episodes each were filmed for a total of ninety-one episodes....

, the alcohol salesman in Entourage

Entourage (TV series)

Entourage is an American comedy-drama television series that premiered on HBO on July 18, 2004 and concluded on September 11, 2011, after eight seasons...

, Leon in The Line, Farhod the Fierce in Pair of Kings

Pair of Kings

Pair of Kings is an American television sitcom shown on the Disney XD cable channel. It was created by Dan Cross and David Hoge and stars Mitchel Musso and Doc Shaw. The sitcom's target audience are teenagers...

, and Ken Tanaka in Glee

Glee (TV series)

Glee is an American musical comedy-drama television series that airs on Fox in the United States, and on GlobalTV in Canada. It focuses on the high school glee club New Directions competing on the show choir competition circuit, while its members deal with relationships, sexuality and social issues...

, and his film roles as Awkward Davies in Master and Commander: The Far Side of the World

Master and Commander: The Far Side of the World

Master and Commander: The Far Side of the World is a 2003 film directed by Peter Weir, starring Russell Crowe as Jack Aubrey, with Paul Bettany as Stephen Maturin and released by 20th Century Fox, Miramax Films and Universal Studios...

and Gary the bartender in Sideways

Sideways

Sideways is a 2004 comedy-drama film written by Jim Taylor and Alexander Payne and directed by Payne. Adapted from Rex Pickett's 2004 novel of the same name, Sideways follows two forty-something year old men, portrayed by Paul Giamatti and Thomas Haden Church, who take a week-long road trip to...

. Gallagher also played Attila the Hun

Attila the Hun

Attila , more frequently referred to as Attila the Hun, was the ruler of the Huns from 434 until his death in 453. He was leader of the Hunnic Empire, which stretched from the Ural River to the Rhine River and from the Danube River to the Baltic Sea. During his reign he was one of the most feared...

 in Night at the Museum

Night at the Museum

Night at the Museum is a 2006 fantasy adventure-comedy film based on the 1993 children's book The Night at the Museum by Milan Trenc. It follows a divorced father trying to settle down, impress his son, and find his destiny...

, Chow in True Blood

True Blood

True Blood is an American television series created and produced by Alan Ball. It is based on The Southern Vampire Mysteries series of novels by Charlaine Harris, detailing the co-existence of vampires and humans in Bon Temps, a fictional, small town in the state of Louisiana...

, Anderson in the movie Severed

Severed

Severed: Forest of the Dead is a 2005 zombie suspense horror film directed by Carl Bessai and set in a remote logging community following an incident where a genetic experiment goes wrong.-Premise:...

, and a rabble-rouser in one episode of Battlestar Galactica

Battlestar Galactica

Battlestar Galactica is an American science fiction franchise created by Glen A. Larson. The franchise began with the Battlestar Galactica TV series in 1978, and was followed by a brief sequel TV series in 1980, a line of book adaptations, original novels, comic books, a board game, and video games...

. Also, Gallagher was in Smallville

Smallville

Smallville is the hometown of Superman in comic books published by DC Comics. While growing up in Smallville, the young Clark Kent attended Smallville High with best friends Lana Lang, Chloe Sullivan and Pete Ross...

 Season 3, Episode 5 "Perry" as the local bar's bartender.
He has also played in Hawaii Five-0 in season 1 episode 5. He was playing the character Carlos Bagoyo.

External links