Sign of an authentic plot

YOU must watch BBC1's new drama REUNION (9pm). And I mean "must watch" in two different ways. First, I simply mean you'd be mad to miss it. It's a powerfully emotive revenge thriller. You like those, don't you? Me too.

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So far, I've only seen the first of its four episodes (the second is tomorrow, the others next week), but already I'm hooked.

The second sense in which you "must watch" it, if you're to follow what's going on, is you'll have to look at your TV the whole time.

Don't imagine you can simultaneously scroll through Instagram or TwitTwonk, looking at make-up tips or kittens playing basketball. You'll need to pay this series proper attention.

That's because Reunion has subtitles. And it's got those because much of the dialogue is in British Sign Language.

Reunion is the story of Daniel Brennan (Matthew Gurney), a deaf man released on parole, having served 10 years for murder.