"It's a gas-emitting time bomb," the Doctor said, "It'll fill these two rooms, kill us, and evaporate into nothing, looks like we just had a heart attack. I imagine then whoever is behind this will arrive, clean up any evidence to the contrary."

He darted towards the window, "As for disabling it, that will take more than two minutes, which happens to be what we've got until it goes off. Well, more like a minute thirty."

"There's a ledge outside the window, help me get it open. If we can get out for the next few minutes, we'll be safe!" He struggled with the lever, "They've sealed this, too!"