Aka：Teorie velkého třesku / Teória veľkého tresku / Big Bang / Теория большого взрыва / Agymenők / 生活大爆炸 / A Teoria do Big Bang / Теория за големия взрив / Teoria wielkiego podrywu / The Big Bang Theory / המפץ הגדול / Teoria Big Bang / 빅뱅이론 / Теорія великого вибуху / Didžiojo sprogimo teorija / Gáfnaljós / Rillit huurussa / Teorija Velikog Praska / تئوری بیگ بنگ / ビッグバン★セオリー ギークなボクらの恋愛法則 / ทฤษฎีวุ่นหัวใจ / نظرية الانفجار العظيم / 宅男行不行 / Big Bang: A Teoria / Штребери / Vụ Nổ Lớn / La Teoría del Big Bang / დიდი აფეთქების თეორია / Lielā sprādziena teorija / Тэорыя вялікага выбуху / Veliki pokovci / Katta portlash nazariyasi / Suure paugu teooria / 囧男大爆炸
Summary：Leonard and Penny renew their vows, this time inviting their friends and family for wedding party; they also learn that marriage is about compromise, and figure out how to support each other. Sheldon and Amy experiment to take their relationship to the next level, and after an emotional struggle they move in together in Penny's old apartment. Howard and Bernadette realise that being a parent is a full-time job, but with the help of their friends they manage to find joy in raising their child. When his friends tell him he's extremely spoiled, Raj decides to stop taking his father's money and learn how to make ends meet.
