Behind-the-scenes

There's also a great deal of so called behind-the-scenes work.

Fifty-four years ago, Katherine Johnson did the behind-the-scenes math to put a man in orbit. Today, almost 60 women have blasted into space themselves.

The Blu-ray contains a 20-minute behind-the-scenes featurette.

Patreon is a membership platform that allows content creators to build a subscription service and in return, members gain access to exclusive perks and behind-the-scenes viewings.

Like the activities of British Railways Research Department, developing, testing and modifying diesel locomotives before their acceptance for service is another behind-the-scenes activity which is a closed book to most passengers and to many railwaymen.

[...] we managed to gain remarkable access to the disused parts of London's tube network - and here, I'm able to share a bit of the behind-the-scenes experience.