Back at the office you said something about a secret project.

I'm looking for three special people this summer to work on a secret project.

In the play it also refers to a secret military project.

But no project, however secret, had permission to murder people.

They tried to make me take that job again - the one I told you about - the secret project.

Maybe this was some sort of top secret Romulan project?

Or, in this case, by extension, to a small staff working under his immediate direction on a secret project.

Of one thing he was sure: He did not want to be seen at the secret project!

"Could the men have been engaged for some secret project by the Argentine government?"