Event: Tyrion Lannister - Act of Betrayal (Political Wins)

Episode 5: The Bells at 26:21
Tyrion unlocks Jaime's chains and frees him, sending him on a covert mission to rescue Cersei and end the war before Daenerys destroys the city.

"Tens of thousands of innocent lives. One not particularly innocent dwarf. Seems like a fair trade."
(Act of Betrayal)