Final answer:
Natasha Henstridge portrayed the character Sil in the 'Species' movie series, which was her breakthrough role and is set in the science fiction and thriller genres.
Step-by-step explanation:
Natasha Henstridge played the character Sil in the Species movie series. Sil is the human-alien hybrid that is the central character in the Species franchise. The movie falls into the science fiction and thriller genres. Although Henstridge is known for a variety of roles in film and television, her breakthrough role was as Sil in Species, released in 1995. This role showcased her acting abilities as well as the special effects and makeup techniques of the mid-90s, which were used to bring her character to life.