
who doesn't need to fill the holes
in their RELATIONSHIP with a third party.
The Big Bang Theory Season 10, Episode 18

It relies on the homonymic RELATIONSHIP
between tick, the bloodsucking arachnid...
The Big Bang Theory Season 2, Episode 1

Relationship Agreement
is ready to be signed.
The Big Bang Theory Season 10, Episode 13

So where exactly are we
in this RELATIONSHIP?
The Big Bang Theory Season 6, Episode 1

...saying
that you're in a secret RELATIONSHIP...
The Big Bang Theory Season 4, Episode 21