Question: Which star in "Zodiac" was also in "Samantha"?

Context paragraphs:
Delta Sagittarii: Delta Sagittarii (δ Sagittarii, abbreviated Delta Sgr, δ Sgr), also named Kaus Media, is a double star in the southern zodiac constellation of Sagittarius.  The apparent visual magnitude of this star is +2.70, making it easily visible to the naked eye.  Parallax measurements place the distance at roughly 348 ly from the Sun.

Epsilon Aquarii: Epsilon Aquarii (ε Aquarii, abbreviated Epsilon Aqr, ε Aqr), also named Albali, is a star in the equatorial zodiac constellation of Aquarius.  It is visible to the naked eye with an apparent visual magnitude of 3.77.  The distance to this star can be determined from parallax measurements, yielding an estimated value of around 208 ly from the Sun.

Zodiac (film): Zodiac is a 2007 American mystery-thriller film directed by David Fincher.  The screenplay by James Vanderbilt is based on the 1986 non-fiction book of the same name by Robert Graysmith.  The film stars Jake Gyllenhaal, Mark Ruffalo, and Robert Downey, Jr., with Anthony Edwards, Brian Cox, Elias Koteas, Donal Logue, John Carroll Lynch, Dermot Mulroney, and Chloë Sevigny in supporting roles.

Epsilon Sagittarii: Epsilon Sagittarii (ε Sagittarii, abbreviated Epsilon Sgr, ε Sgr), also named Kaus Australis, is a binary star system in the southern zodiac constellation of Sagittarius.  The apparent visual magnitude of +1.85 makes it the brightest star in the constellation.  Based upon parallax measurements, this star is around 143 ly from the Sun.

Gamma2 Sagittarii: Gamma² Sagittarii (γ² Sagittarii, abbreviated Gamma² Sgr, γ² Sgr), also named Alnasl, is a 3rd-magnitude star in the zodiac constellation of Sagittarius.  The location of this star forms the tip of the arrow in the bow of Sagittarius the Centaur.  This star is close enough to the Earth that its distance can be determined using parallax, yielding a value of about 96.9 ly from the Sun.  It has an apparent visual magnitude of +2.98, making it the seventh-brightest star in the constellation.

Epsilon Virginis: Epsilon Virginis (ε Virginis, abbreviated Epsilon Vir, ε Vir), also named Vindemiatrix, is a star in the zodiac constellation of Virgo.  The apparent visual magnitude of this star is +2.8, making it the third-brightest member of Virgo.  Based upon parallax measurements made during the Hipparcos mission, Vindemiatrix lies at a distance of about 109.6 ly from the Sun, give or take a half light-year.

Dermot Mulroney: Dermot Mulroney (born October 31, 1963) is an American actor.  Acting since the 1980s, he is known for his roles in the films "Young Guns", "Samantha", "Where the Day Takes You", "My Best Friend's Wedding", "The Last Outlaw", "About Schmidt", and "".  Mulroney played the main antagonist of NBC's "Crisis", Francis Gibson.

Theta Scorpii: Theta Scorpii (θ Scorpii, abbreviated Theta Sco, θ Sco), also named Sargas, is a binary star in the southern zodiac constellation of Scorpius.  The apparent visual magnitude of this star is +1.87, making it readily visible to the naked eye and one of the brightest stars in the night sky.  It is sufficiently near that the distance can be measured directly using the parallax technique, which yields an estimate of roughly 300 light years (90 parsecs) from the Sun.

Zeta Geminorum: Zeta Geminorum (ζ Geminorum, abbreviated Zeta Gem, ζ Gem), also named Mekbuda, is a star in the zodiac constellation of Gemini, on the outstretched left 'leg' of the twin Pollux.  As a member of the category of variable stars known as classical Cepheids, it has a regular pulsation frequency that is closely related to the luminosity and the star serves as an important calibrator for the cosmic distance ladder.

Denebola: Denebola, also designated Beta Leonis (β Leonis, abbreviated Beta Leo, β Leo) is the second-brightest star in the zodiac constellation of Leo, although the two components of the γ Leonis double star are unresolved to the naked eye and have a combined magnitude brighter than β.  It is an A-type main sequence star with 75% more mass than the Sun and fifteen times the Sun's luminosity.  Based on parallax measurements from the Hipparcos astrometry satellite, the star is at a distance of about 36 ly from the Sun.  Its apparent visual magnitude is 2.14, making it readily visible to the naked eye.  Denebola is a suspected Delta Scuti type variable star, meaning its luminosity varies very slightly over a period of a few hours.

Supporting paragraphs: Zodiac (film) Dermot Mulroney
Answer: Dermot Mulroney