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From here.]
Badd tried the doorknobs one at a time, finding them locked. He considered just kicking the door down and forcing his way through SWAT-team style, but the doors looked surprisingly sturdy and he didn't want to spend the rest of the night limping. There were a lot of doors, though, and one of them had to go to something useful. Didn't have to be the door to the time travel machine room, just something that let him get an iron bludgeon or a scrap of interesting evidence.