Looking for some riveting TV? Try this 2012 series (on Prime and Britbox). Seasons 1-4 (6 in all) are addictive with unending plot twists, complex characters, and a breakneck pace. Being based on real life usually doesn’t matter--except in this case it does because nobody could write like this without real-life insider knowledge--plus an incredibly devious mind. Not surprisingly, it’s based on real anti-corruption police units in Belfast, Northern Ireland, and anonymously advised by a real cop. The script is uncompromising and very smart. Masterful performances make you care about the people as much as unraveling the plot.