Bull by this point has kinda lost track of his reasons for sticking with crazy bitch for so long. He can't even tell himself why he actually brought Tom to Q...
He fears a great deal that Tom will open her eyes while he is away from the immediate vicinity.
Yet it would be too suspicious for him to refuse to go check out what's going on.
While not evident, there has been a lot of sabotage going on since last we checked in with these guys!