Has Spooks jumped the Shark?

[malvolio]

The real entrance is probably via a shed in someone's back yard.

Otherwise tracking MI5 staff would be a tad too easy. Just tail them home from the office.

The door you see on Spooks is there, but never used, the main entrance faces the Embankment.

The Tradesman's entrance to Thames House is round the back. It's about 40 feet high so not exactly inconspicuous. I've never seen so many cameras outside one building. I suspect anyone trying to tail someone wouldn't get past Millbank.

[Churchill]

The door you see on Spooks is there, but never used, the main entrance faces the Embankment.

The Tradesman's entrance to Thames House is round the back. It's about 40 feet high so not exactly inconspicuous. I've never seen so many cameras outside one building. I suspect anyone trying to tail someone wouldn't get past Millbank.

The door you see on Spooks is the entrance to Freemasons Hall on Great Queen Street - and we have more secrets than MI5

https://www.mi5.gov.uk/output/thames-house.html