Fridge Brilliance
- Wow, that accounting person was still there in the evening - she sure has a long shift! Ah, hospital workers tend to get stuck with 12 hour shifts, especially back in The '90s.
- In the first movie, there's a closeup of Sil in John Carey's garden where she blinks and we see that she has nictitating membranes in addition to "normal" eyelids. You thought that was just there because it looks cool and alien. Nictitating membranes are a feature possessed only by semi-aquatic tetrapods, so her having them is a subtle indication that she can function underwater for prolonged periods, foreshadowing the scene at the film's climax where she hides underwater to elude the heroes.
- Some desert animals have them too, but the foreshadowing still stands.
- What makes this still stand is Sil's nightmares, the ones she has about mating with another creature like herself, they are clearly shot underwater, so maybe the aliens themselves are aquatic or amphibious.
- The irony is that the dream sequences was filmed underwater to give the sequence a surreal feeling, not to hint that Sil is aquatic or amphibious.
Fridge Logic
- Sil's pickiness about her mates' genetics (n.b. her rejection of the diabetic guy) makes no biological sense with regard to her rapid gestation rate. Most female animals that mate selectively do so because taking an inferior mate wastes a considerable portion of their reproductive lifespan by carrying and nurturing an inferior genetic offspring. This is time they could better spend carrying a superior child if they choose their mates well. But in Sil's case, this makes no sense because she completes her pregnancies so quickly. Her babies are born and able to hunt their own food within minutes of conception. But after rejecting the diabetic, it took Sil almost 24 hours to court and seduce her next mate. If she'd had sex with the diabetic, then by the time she slept with the hot tub guy, she would've already have had her first child. Maybe the child would've been dead from its sub-standard genetics, or maybe it would've been carrying and propagating an imperfect version of Sil's DNA. Either way, Sil is no worse off in terms of her procreative drive; and 24 hours later, she's still seducing her next target, getting ready to make baby number 2.
- If we accept second film events as canon, then human genetic disorders are very toxic for aliens. Alien was killed by being stabbed with pitchforks covered in the blood of a carrier for a genetic disorder.. Such a sick baby (or even sperm) may be very toxic for Sil. Even if it didn't kill her, that’s a waste of time to be sick. I would compare it to predators not eating rotten meat. It isn't any effort to eat it, but the consequences may be tragic.
