![Previously,
onThe Big Bang Theory...
Previously,
onThe Big Bang Theory...](data:image/png;base64,R0lGODlhAQABAAD/ACwAAAAAAQABAAACADs=)
Previously,
onThe Big Bang Theory...
The Big Bang Theory Season 12, Episode 23
![NARRATOR:
Previously on The Big Bang Theory:
NARRATOR:
Previously on The Big Bang Theory:](data:image/png;base64,R0lGODlhAQABAAD/ACwAAAAAAQABAAACADs=)
NARRATOR:
Previously on The Big Bang Theory:
The Big Bang Theory Season 6, Episode 1
![LEONARD: Previously on
The Big Bang Theory...
LEONARD: Previously on
The Big Bang Theory...](data:image/png;base64,R0lGODlhAQABAAD/ACwAAAAAAQABAAACADs=)
LEONARD: Previously on
The Big Bang Theory...
The Big Bang Theory Season 10, Episode 23
![Previously on
The Big Bang Theory...
Previously on
The Big Bang Theory...](data:image/png;base64,R0lGODlhAQABAAD/ACwAAAAAAQABAAACADs=)
Previously on
The Big Bang Theory...
The Big Bang Theory Season 12, Episode 17