As it turns out, Summer was in town with her fiancé, a man named Marshal who knows nothing of her past. At the end of the episode, she introduces Cho to her fiancé and they depart to get married.

Does Cho end up with anyone?

At their wedding, Cho gives Jane and Lisbon big hugs and smiles widely. He is also seen with Grace and Rigsby dancing and taking photos, reuniting. Cho ends the series very happily; as leader of the team, with friends around him, and a smile on his face.

What happens with summer and Cho?

After she steals drugs from one of her contacts, a drug dealer, he beats her. Cho seeks out the dealer and beats him. After a heated argument with Cho about her use of drugs, she takes his advice to leave the state and start over, thus ending their relationship.