(Based off the Bones episode "Aliens in a Spaceships" Full recap here: http://www.tv.com/shows/bones/aliens-in-a-spaceship-879259/recap/)
John and Lestrade are kidnapped and buried alive in a car. They do their best to send for help (hotwiring John's cell phone to the wires of the car horn and sending a text about where they are because you know John read Sherlock's blog about the different types of dirt of London.
Mycroft and Sherlock must find them before they run out of air.
Bonus: John and Lestrade write goodbye letters for Sherlock and Mycroft just in case.
John and Lestrade are buried alive.
John and Lestrade are kidnapped and buried alive in a car. They do their best to send for help (hotwiring John's cell phone to the wires of the car horn and sending a text about where they are because you know John read Sherlock's blog about the different types of dirt of London.
Mycroft and Sherlock must find them before they run out of air.
Bonus: John and Lestrade write goodbye letters for Sherlock and Mycroft just in case.
Happy S/J and M/L ending please.