Labyrinth and Dragon

Labyrinth and Dragon (迷宮と竜, Meikyū to Ryū) is the third episode of the anime series Full Metal Panic! The Second Raid.

Summary
In Nanjing, Amalgam kidnaps peace delegations from Northern and Southern China and fortify themselves in an underground tunnel beneath the Yangtze River. Mithril attempts a rescue in the tunnel's dangerous confines, but falls into Amalgam's trap.