How long did it take...
...for the aliens to be absorbed into their hosts? Did the series give any clues about that.
Usually, some sucker would get grabbed by the neck and in the next shot of them, would be possessed, giving the impression it was a relatively quick and unmessy process. However, there were a couple of (brief) scenes of aliens actually melding into human flesh, plus the aliens are quite large, so it must take a long process. Anyway, just a question about something that had always tickled at my mind.
When darkness overcomes the heart, Lil' Slugger appears...