Possibly the best Series?

[RoninExec]

I found Series 5 being the turning point from a top British show, in the likes of "Tinker Tailor Sailor Spy"'s TV adaptation, to a Hollywood-esque copycat borne on action scenes and if often good story topics, very unbelievable plots.

Seems like they were unable to write an episode without the characters waving a Glock every 5 minutes... It just didn't jive and lost the "plausibility" of the first 4 seasons.

Running in London streets with a gun in your hand and no cop show up ?
Constantly cocking a hammer that does not exist ? (DAO handguns such as the Sig Sauers and the Glocks used there do not have apparent hammers) Oh come on...

In the first seasons Tom or Danny would call in the "heavies", weather MPS Armed Response or even SAS. Since S5 the spooks just bust doors and barge in a flat full of terrorists without even the basic safety gear such as a vest...

Nah, the good years stopped at S4... After that they sacrificed credibility to US-style action scenes. Too bad, the European touch was so peculiar.