there's a piece of gear called an rf dac. it converts digital signals into analog and we need it to send the update from this computer to the control room. collins set this all up. walter: it's how collins structured it. he planted a trojan horse he knew would be triggered once happy ran the system test. general, i'm sorry to say there's a third step. we need analog antennas. we've got them at the base. but that's a half an hour away. we need to get to mark's house. good god, how many times are you going to play right into his hands? we should figure something out here. i do not want to go to him. but please trust me. they're television's smartest team. we do not do dangerous. we do calculations. announcer: but cbs tomorrow... there is an earthquake! ...these geniuses will face... this is as bad as it gets. or stream it live or on demand. rrator: how do we top the biggest season ever? with the biggest big bang secret ever. thursday can't get here soon enough. (alarm whooping, tires squeal) warning system! three minutes till a