So it was Hugh Grant’s sociopathic surgeon in his lover’s art studio with the sculptor’s hammer. The final by David E Kelley and Susanne Bier The undo (Sky Atlantic / HBO) has a big reveal all right – but it’s not a bomb regarding the murderer of Elena Alves (Matilda De Angelis). It is so that we have given too much credit to this shiny and apparently ingenious unit. In the end, it turned out that the killer was the obvious suspect. Everything else was just a distraction. For the past five weeks, the series has been hanging around on Smoke, Mirrors, and Grant’s Hollywood Grins.