Cheers - Season 11 Episode 9

Cliff is convinced that his new neighbour is Adolf Hitler. If not for Ma standing up for him, Cliff would be evicted from the building for harassment. But Cliff's still not convinced as to his neighbour's true identity. Meanwhile, Carla and John Allen Hill continue their love-hate relationship. However it has gone to a new level, to a love-hate-heart attack stage. Hill had a heart attack while they were making love. Seemingly indifferent to the heart attack since Hill is just a romp in the hay, Carla eventually breaks down in tears since "her boyfriend" had a heart attack. She suspects that the reason he did have a heart attack is she spurted out the words "I love you" to Hill.