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12 seasons, 279 episodes, and more "bazingas" than anyone could count — yet "The Big Bang Theory" still never found the time to wrap up these storylines…


Penny's last name | 0:00
True love for Raj | 1:00
Sheldon's fear of public speaking | 1:54
Penny's missing sister | 3:03
Who got tenure? | 3:51
Alex Jensen | 4:36
Did Penny finish her course? | 5:44
Mary and Beverly | 6:33
Howard's dad | 7:14
Howard's half-brother | 7:52
Penny's businesses | 8:46