Stephen Arden
Biographical information
Gender Male
Species Human
Age 36
Status Deceased
Cause of Death Alien Attack
Killed by Sil
Family Unnamed Son
Sil(Sex Encounter)
Abilities Anthropology
Played by Alfred Molina
Appearances Species

Stephen Arden is a character and scientist (anthropologist) from the film Species.


Stephen was an anthropologist member of a team of scientists and specialists led by SETI head honcho Xavier Fitch, which tracks and destroys Sil.

When the team celebrates their apparent victory, and the death of Sil. In fact, Sil is still alive and stalks them in their hotel. Sil takes an attraction to Preston "Press" Lennox. Following Dr. Laura Baker and Lennox to their room, Sil eavesdrops on their lovemaking and becomes aroused. After failing to pick up women at the bar, Stephen decides to call it a night and heads to his hotel room. When Stephen walks in on her eavesdropping, she tells him that she stole the key and saw him downstairs. Sensing no health issues with him she immediately undresses in order to seduce him into sex. Hesitant at first, Arden begins undressing as soon as Sil starts kissing him. Fully into her kissing, he brings her in closer as they embrace. Sil then pushes Stephen onto the bed, not noticing her strength and aggressiveness, Stephen begins to undo his pants and Sil proceeds to mount him despite him asking her about protection. Once their clothes are off, Stephen allows Sil to ride him as he enjoys the sex act. During this, Arden's team mate Dan Smithson has figured out that Sil is alive and as he walks past Arden's room, Dan can hear the loud moans of Arden and Sil. After Dan tells Press and Laura that Arden is with Sil, Stephen has reached orgasm which impregnates Sil instantly. An exhausted Stephen tells Sil that he "enjoyed it immensely" as he proceeds to rest from the experience. As he rests, Sil can feel their child growing inside of her which causes her to smile. When Sil tells him that she can feel it, she takes the hand of the disbelieving Stephen and places it on her stomach as he does indeed feel something in Sil's womb and knows who she is, which results in Sil killing Arden.


  • "Oh my dear... I enjoyed that immensely!"
  • "Who are you? What are you doing here?"
  • "Wh... What are you doing?"
  • "This sort of thing doesn't usually happen to me"
  • "What about protection?"
  • "What?"
  • "Felt what?"
  • "What's started?"
  • "Oh, my darling girl!'
  • "Now, I know in some South African tribes women believe they know the exact moment of conception, but really..."
  • "Holy Shit!"