Jake slammed the radio down. “He’s inside our comms. Again.”
Emma pointed at the map. “We’re out of time. Train 214 is approaching the next station.”
Jake holstered his weapon. “We’re boarding it. ”They burst onto the platform just as the train screeched into Finchley Road. The brakes screamed. Doors hissed open. Jake and Emma slipped inside before anyone could react. “Carriage Four is three cars down,” Emma whispered. They pushed through the crowd — tourists, night workers, students — all blissfully unaware of the ticking death riding with them. Jake kept his voice low. “Emma, once we reach the device, we isolate the carriage. Clear civilians. I’ll handle the disarm.” Emma shot him a look. “You’re not a bomb tech.” “Tonight I am.” They reached Carriage Four. The doors slid open. And Jake’s blood ran cold. The duffel bag was still there — but now a man sat beside it. Hood up. Hands in pockets. Watching them.
Emma murmured, “Jake… he’s guarding it.” Jake stepped forward slowly. “Sir, I need you to stand up and move away from the bag.” The man didn’t move. Didn’t blink. Then he smiled. Not friendly. Not human. “You’re too late.”
He reached into his pocket. Jake lunged. Emma fired. The man collapsed — but as he hit the floor, a small device rolled from his hand. A trigger.
Emma kicked it away. “Dead man’s switch. He was going to detonate manually.” Jake dropped to the duffel, unzipping it with trembling precision. Inside: a compact explosive rig, wires coiled like veins, a digital timer blinking silently. No countdown. Just a single word on the display: ARMED

Emma scanned the carriage. “Jake… we need to evacuate now.” Jake shook his head. “If we open the doors, the pressure change could trigger it.” Emma’s voice tightened. “Then what do we do?” Jake stared at the device — and saw something odd. A second module. A transmitter. He whispered, “This bomb isn’t meant to explode here.”
Emma blinked. “What?” Jake pointed. “It’s waiting for a remote signal. This is part of a synchronised detonation.”
Emma’s face drained. “Meaning there’s a bigger device somewhere else.” Jake nodded. “And this one is just the key.” Before they could react, the train lurched forward — accelerating. Emma grabbed a pole. “Jake… the operator isn’t driving this.” Jake looked up at the CCTV camera in the carriage. The red light blinked.

Someone was watching them…