Over the years, we've formulated many
theories about how he might REPRODUCE.
The Big Bang Theory Season 2, Episode 6
But if successful, I will map
and REPRODUCE your thought processes...
The Big Bang Theory Season 4, Episode 3
I'm quite aware of the way
humans usually REPRODUCE...
The Big Bang Theory Season 4, Episode 1
...that seek to REPRODUCE
using humans as their host.
The Big Bang Theory Season 4, Episode 20