: Dr. Ramona Nowitzki, an obsessive admirer from Season 2, reappears at Caltech. Despite the gang’s concern, Sheldon is oblivious to her romantic intentions until she kisses him in his office.

: After the kiss, Sheldon immediately leaves for the airport and flies to New Jersey. The episode ends on a cliffhanger with him on one knee outside Amy’s door, asking her to marry him. Key Highlights & Trivia The Long Distance Dissonance | The Big Bang Theory Wiki

" The Long Distance Dissonance " is the Season 10 finale (Episode 24) of The Big Bang Theory , centered on a major turning point for Sheldon and Amy's relationship while Amy is away at Princeton.