How did the gang react to that awkward hookup?
That was addressed on The Big Bang Theory Season 10 Episode 1 when the gang learned of the overnight tryst between Sheldon's mother and Leonard's father.
Meanwhile on this hit CBS comedy series, Penny's dysfunctional family arrived in town for the wedding, including her neurotic mom and drug-dealer brother.
How did her family get along with the other characters?
Use the video above to watch The Big Bang Theory online to get up to speed with the latest drama as the show kicks off a new season.
Paul Dailly is a staff writer for TV Fanatic. Follow him on Twitter.