
I could easily defeat you single-handedly,
but the rules REQUIRE four.
The Big Bang Theory Season 1, Episode 13

And doesn't REQUIRE outside machinery
to be built to access it.
The Big Bang Theory Season 8, Episode 21

Going smaller would REQUIRE
weeks' worth of new computations.
The Big Bang Theory Season 10, Episode 15

Going smaller would REQUIRE
weeks' worth of new computations.
The Big Bang Theory Season 10, Episode 23

...REQUIRE me to bring you
a hot beverage in time of need.
The Big Bang Theory Season 4, Episode 22