Line of Duty
Keeley Hawes played the main antagonist in the second series of the BBC drama.
It was the beginning of the end for DI Cottan, as Daniel Mays also joined the cast as Danny Waldron.
Thandie Newton joined the cast of the BBC drama, as a nation asked: "Who is H?"
Looks like people have worked out who "H" is already (sort of).
With all that was going on, you're totally forgiven for missing them.
And yes, we're still asking who 'H' really is.
The HuffPost UK Entertainment team round up this week's highlights, featuring the BAFTA nominees for the best TV moments from 2018, the Dumbo remake and this week’s Celeb Stock!
Just wait until you hear Vicky McClure's 'H' theory.
Jed Mercurio's latest efforts are only a few months away.