From The Big Bang Theory – Season 11 Episode 21: ‘The Comet Polarization’ (11×21)
(Leonard gets a text)
Penny Hofstadter: Who is that?
Leonard Hofstadter: Sheldon.
Penny Hofstadter: Who is he mad at?
Leonard Hofstadter: Neil Gaiman.
Penny Hofstadter: Who's that?
Leonard Hofstadter: Not us.
Penny Hofstadter: Great.
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