“NCIS” legendDavid McCallumis no stranger to dead bodies well, fictional ones at least.

Fans couldn’t get enough of their chemistry (via Outsider).

They even loved working together.

Brian Dietzen and David McCallum smiling

A lot of the reason I stuck around is because David and I had a great relationship and repartee.

The writers and producers saw that and said, ‘Let’s keep that guy around.

Keep him working with us,'" Dietzen shared.

Brian Dietzen and David McCallum smiling

How exactly did their great friendship form?

Through bonding over an autopsy, of course (viaShowbiz Cheat Sheet).

And I remember thinking, ‘Oh, David’s inviting him to an autopsy.’

This is like a test, number one.

And Brian right away went, ‘Absolutely!’

And they were off.

And I thought, ‘Wow, commitment.’

And there they are."