I just finished the last episode of
Patriot on Amazon, rated 8.2/10 on IMDb.
Follows the complicated life of intelligence officer John Tavner, whose latest assignment--to prevent Iran from going nuclear--requires him to forgo all safety nets and assume a perilous, non-official cover. An
official cover operative is one who assumes a position in an organization with diplomatic ties to the government for which the operative works such as an embassy or consulate. This provides the agent with official diplomatic immunity. Operatives under
non-official cover (NOC) are operatives without official ties to the government for which they work who assume covert roles in organizations. They don't have the safety net of diplomatic immunity, and if captured and charged as spies are subject to severe criminal punishments, up to and including execution.
To prevent Iran from going nuclear, intelligence officer John Tavner must forgo all safety nets and assume a perilous non-official cover ("NOC") of a mid-level employee at a Milwaukee industrial piping firm. You won't believe what he does to get the job. He has a hard time learning the industrial piping industry lingo, like the 2 phrases in the picture of captions below.

If you see watch a couple of the previews you'll probably be interested in the series.
https://www.imdb.com/title/tt4687882/?ref_=ttep_ov https://en.wikipedia.org/wiki/Patriot_(TV_series)