Musebox

Ten is silent as Trunks speaks; bomb not good but can handle that - seen enough of those. Wait. There's a clever look on his face. Might have a remote shut off switch. Which Ten jumps up and begins to build something from random different pieces and as he's running around gathering those, "We could test that theory out. My Tardis has his readings stored in her memory banks - all we need to do is build the transmitter."