Event: Petyr Baelish (Littlefinger) - Death (Deaths)

Episode 7: The Dragon and the Wolf at 60:16
Littlefinger has his throat slit by Arya Stark, after his betrayals and treason are exposed by Sansa Stark in the court of Winterfell to the Northern and Vale lords.

Sansa: "Thank you for all your many lessons, Lord Baelish. I will never forget them."