I just finished up watching this 6 episode series on Netflix and if you enjoy British crime dramas it's worth your time. It takes place in the early 90s when heroin starts making it into England. It's about a few different customs agents that go undercover to infiltrate the drug trade with very little direct support from the government. Steve Coogan, who I've rarely seen in anything that isn't comedic, runs the task force.

Ive watched 4 episodes and and enjoying it.

Yep, really liked the first two episodes.

Finished this last night. Thoroughly enjoyed it.