TV series example of the word

The Big Bang Theory Season 7, Episode 17
Well, we just... we e-mailed back and forth a bit,

Breaking Bad Season 4, Episode 9
Move your feet. Running and so forth.

The Big Bang Theory Season 12, Episode 24
We were passing the lime back and forth.

The Big Bang Theory Season 5, Episode 19
set forth by you in the relationship agreement.

Breaking Bad Season 2, Episode 1
Communication. Communication, right? Back and forth. Come on.