Martin Compston speaks out on Line of Duty fan theories ‘Some are bang on the money’

“You’ve got to pay attention, you can’t be on your phone,” he added.

One theory that viewers have come up with is that newcomer DI Joanne Davidson could be linked to ‘H’.

Towards the end of episode one, viewers got a glimpse at the kind of person DI Davidson is.

Not only did she have a number of bolts locking her front door, but there was a photo that showed a picture of her and an older woman in her flat, which could have been her mum.

Episode one concluded with DI Davidson throwing a glass at the photo, but why?

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