Introduction: Titanic's Tragic Twin: The Britannic Disaster (2:27); Eye Witness Accounts (2:59); November 21, 1916 (4:57); Exploring the Wreck (5:15); Diving the Wreck (3:24); Cause of the Explosion (3:42); Captain's Bridge, Britannic (5:04); Britannic Takes on Water (3:17); Why Did Britannic Rapidly Sink? (4:36); Britannic's Propeller (3:50); Death and Drowning (6:07); Britannic Sinks (5:07); Sinking Aftermath (7:32); Credits: Titanic's Tragic Twin: The Britannic Disaster (0:42);