Leland Jones Orser (born August 6, 1960) is an American actor, director and writer.

He has appeared in numerous film and television roles since his debut in 1991, notably as Lucien Dubenko on the television series ER (2004–09), Father Romero on Ray Donovan (2015–16), Richard Stratton on American Gigolo (2022–present), and Sam Gilroy in the Taken film series (2008–14).

[5][6] That same year, he made his television debut in 1991 on the series Gabriel's Fire, and went on to appear in programs such as The Golden Girls, Cheers, L.A. Law, The X-Files, NYPD Blue, Law & Order: Special Victims Unit and CSI: Crime Scene Investigation.

Orser also appeared in various roles in the Star Trek franchise, among them playing a Changeling posing as the Romulan Colonel Lovok in the Star Trek: Deep Space Nine episode "The Die is Cast" and in the episode "Sanctuary" playing a bit part as a member of the Skrreean race.

In Star Trek: Enterprise, he played the character "Loomis" in the time-travel episode "Carpenter Street".