he now has Leonard Nimoy's DNA.
The Big Bang Theory Season 12, Episode 24
with your
DNA in it.
The Big Bang Theory Season 7, Episode 7
Oh, sure, '’cause
Sheldon'’s DNA plus my DNA
The Big Bang Theory Season 12, Episode 3
Oh, sure, '’cause
Sheldon'’s DNA plus my DNA
The Big Bang Theory Season 12, Episode 3
Yeah, I was studying
recombinant DNA technology...
The Big Bang Theory Season 2, Episode 4