Why was Jon Snow a traitor?

Related questions

1. Who are the white walkers in Game of Thrones?
2. What episode does Khal Drogo die?
3. Who is going to die Game of Thrones?
4. Did Brandon Stark die?
5. Can Bran Warg into a dragon?
6. Is Hodor a stark?
7. Will George RR Martin ever release the next book?
8. What happened to the youngest Stark?
9. Is Sansa Stark a virgin?
10. What did Bran do to Hodor?

Tags

1. #decided
2. #quite
3. #traitor
4. #finale
5. #night
6. #watch
7. #rationale
8. #simple
9. #brethren
10. #outside
11. #lured
12. #short
13. #south
14. #murder
15. #wildlings
16. #stabbed
17. #setup