I apologize for the problem you are encountering. If you don't mind, I have a few questions.
Do you have the Title Update? Are you logged into your profile and on xbox live when playing the game?
If yes to both, try loading your Episode 2 save (which is towards the end, correct?) and then rewind 1 checkpoint. Replay the end of the game and see if the same crash occurs. If it does, copy your save to an unused slot and load your save game. Tab to Episode 3 and choose to start a new game with random choices. During the 'Previously on' scene, keep an eye on the characters and what they say and see if it matches up with your prior choices. It's possible that your choices will import into episode 3, but the fact that the game crashed before finishing is artificially disaplaying the randomize messaging.