Many Line of Duty viewers are still yet to see the series six finale, and therefore do not know the identity of H or The Fourth Man.
But those tuning in to Monday's This Morning had it completely ruined for them despite the hosts warning viewers that spoilers were coming.
If you haven't seen the episode and don't want to know the outcome, you may want to stop reading now! Phillip Schofield and Rochelle Humes revealed they would be interviewing the Line of Duty cast member who plays the mystery H, and prior to them appearing they warned viewers to turn over as to avoid anything.
But even before this aired, the show had already given the game away unexpectedly as fans tuned in. The opening credits not only revealed H would be on, but they
Read more on mirror.co.uk