She portrayed the title role in the Canadian-American science fiction-adventure television series Andromeda that premiered on October 2, 2000 and concluded on May 13, 2005, after 5 seasons that included 110 episodes.

She also portrayed the female lead role of Rowan in the science fiction-horror movie Jason X (2002), the 10th installment of the Friday the 13th film series.

Doig first carved her niche in the entertainment industry at age 16, when she began accepting adverts and other modelling jobs from a talent agent whom she met while completing a modelling training course. The initial media exposure led to her co-hosting the Canadian game show Video & Arcade Top 10 with friend Gordon Michael Woolvett on YTV, from 1991 to 2006.

While auditioning for television and film roles, she worked on theatre productions of Romeo and Juliet and Arsenic and Old Lace.

Her first television acting role was as "Second Girl" on The Hidden Room in 1993.Her first recurring role was in the TV seriesTekWar in 1994 where she portrayed the role of Cowgirl. Her first movie role was in the film Jungleground in 1995.

Doig got her first big break with a starring role in the movie No Alibi in 2000, opposite Dean Cain and Eric Roberts.

She also landed the title role in Star Trek creator Gene Roddenberry's sci-fi TV series Andromeda where she portrayed the Andromeda Ascendant ship's computer in three dimensions — as the ship's powerful AI (artificial intelligence) on the system's screen, as the AI's hologram, and as Rommie, the android avatar of the AI.

In 2002, she played the female lead role of “Dr. Rowan LaFontaine” in the horror film Jason X, the 10th installment of Friday the 13th film series.

In a recurring role as Dr. Carolyn Lam, Doig also appeared in 11 episodes of the ninth and tenth seasons of Stargate SG-1 between 2005-2007.

In 2010, Doig appeared in 6 episodes in the remake of V as the alien physician Dr. Leah Pearlman. In 2012, she began playing the role of Liber8 terrorist Sonya Valentine in the Canadian science fiction TV series Continuum.

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