Here you go, no fluff: In the UK, ITV1 or ITVX. In the US, BritBox via Amazon Prime or directly. Everywhere else, check local listings or cry into your hands. You’re welcome.
Now go watch it. I’ll be over here stress-eating biscuits and pretending I know how to defuse a bomb. Spoiler: I don’t. But Trigger Point makes me feel like I could try. Don’t test me.