Line of Duty season six hit our screens last month and three episodes in we're completely hooked.
There are already a lot of series six theories floating around Twitter with fans desperate to suss out who H is, and some viewers reckon they cottoned on to a massive clue during Sunday's episode.
Meanwhile, other eagle-eyed fans also couldn't help but notice a glaring filming error in one of the scenes featuring DS Steve Arnott. As the AC-12 investigator headed into a lift to avoid a surprise drug test, a shape of what appeared to be a cameraman could be seen in the reflection of the glass.
Viewers quickly headed to social media to share proof of what they spotted, with one tweet reading, "Everything ok Steve, you seem to have a tv camera in the lift with you there!"
Another viewer added, "Cameraman spotted on Line of Duty in the lift!!"
The official Line of Duty Twitter account even responded, making us a little suspicious. The reply simply read, "Or was it..."
So, was that a clue too? Does this need to factor into our Line of Duty investigation sessions?
"Not a cameraman. It is the ghost of H," another tweeter suggested.
"That's just a drug fuelled hallucination for Steve," one more chipped in, while a third joked, "Was it a cameraman OR was it H colluding with Steve disguised as a cameraman?"
What do you believe? Cameraman or the ghost of H? Line of Duty always knows how to keep us hooked!
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