This week's Big Bang Theory pitted everyone against each other. Sheldon unexpectedly emerged as the most stable and calm source of comfort throughout the entire episode... as long as you don't refuse his warm beverages.
When Raj's sister Pria comes back into town, she and Leonard promptly get back together ignoring Raj's adament refusal. Thankfully, Sheldon and Amy Farrah Fowler are around to cut the tension when the group eats dinner together.
Bernadette gives Howard an ultimatum to choose between his mother and herself. When he chooses Bernadette and moves in, he proves himself to be the world's worst roommate in a matter of seconds.
Penny, coping with the thought of being replaced by Pria, needs some compassion. Sheldon to the rescue!