In Castle's safehouse, the recording ended; the program automatically saved and closed the file. Glass crunched over the sound of footsteps. The stars, unusually visible, were shining through the broken window. Cold air filled the room. A darkened figure slowly strode through, and their warm breath floated through the chilled space. They placed their gloved hand on the mouse, and clicked open the recording. "Still just blindly messing with the dead engineer's tech," a distinct male voice stated outloud. "When you gonna learn, Castle?"

Frank's recording played back several times, looped, as the man leaned on Castle's desk with his elbow, holding up his chin with his closed fist. "You're on to some big game, aren't you?" The man stood up after closing the program once again. He crouched down. He unzipped his camouflage jacket, and reaching in to its concealed pocket, pulled out two glove warmers before ripping their covers off and sliding them in to his gloves. He adjusted his baseball cap before standing.

The man began to explore the safehouse. He looked carefully around corners and ceilings for explosives and other traps. He passed dozens of locked cabinets and chests, already aware of the lethal armaments contained within. He knew where he was going as he unlocked and opened a door and down the two steps beyond it. "Relatively remote neighborhood... an interior suitable for a workshop... hell, the garage is just a nice bonus."

He could see the light chord dangling in the middle of the room. He began to reach for it, but quickly pulled his hand back. "Yow... you almost got me there, I bet." Instead, the man reached in to his pocket and withdrew a flashlight. "Only going to bill you for the trip wire, sir... the explosives on the garage door are free." He flipped the flashlight on, and at that very moment he noticed the mounted security camera. It made a noise as it came to life. "Shit!" He drew his .44 as quickly as he could and shot the camera, but he knew he was too late. He shot out one of the windows on the garage door and leaping to it, struggled to squeeze through.

Castle's blackberry beeped; a new e-mail message. As he waited in his car at a light, he turned on the device's screen and read the message's subject: ALERT 15. "The garage camera," Castle said outloud. "Damn... safehouse is compromised." An image was attached. Castle saw the man reaching for his sidearm as a flashlight dropped towards the ground. Didn't look like a cop. "No use for it now." He replied to the message, typing only a subject: TRIGGER 15.

The side of the house exploded as the garage's bomb armed. The flames rose high in to the air as debris fell around the ruined building. The intruder laid still in the dirt nearby. He groaned as he sat up. "Ironic... I thought it was me got hired to blow up your house, back in the day. Guess turnabout is fair play." A police car pulled up, its lights flashing. The cop inside stepped out, and ran around the back of the car as the intruder got to his feet.

"Sir, was there anybody else inside?" The cop's eyes got wider as he stepped towards the man, his scarred and manipulated face illuminated by the blaze. "Your face... are you hurt?"

"Yeah," replied the man as he raised his .44 and shot the officer through the forehead, killing him instantly. "But it didn't happen tonight." He put away his weapon and ran from the scene.