Continuity mistake: When Fred Francis is at the control booth, his stance changes between every shot, from standing up straight, to bending over, with his leg up, then down, etc. (00:09:35)
Continuity mistake: When werewolf Eddie takes the file from Terry's hand, while she's on the phone, the phone drops from her ear, to the floor, twice between shots. (01:00:45)





Answer: I think they were purposely brought there to both join the colony. Marsha, who desired Bill, was impatient and bit him. As for not being mad at her, the Colony was slowly turning to her leadership, instead of the Doctor's compassion treatment.
Why would the colony want Bill and Karen to join them?