More than 330,000 local people watched The Secret last night and bore witness to driller killer dentist Colin Howell as he drugged his mistress to stop her feeling guilt during sex.
For the last three weeks, viewers in Northern Ireland have had a date with UTV at 9pm to watch James Nesbitt and Genevieve O'Reilly play twisted lovers Colin Howell and Hazel Stewart.
The depiction of the true life love affair between the dentist and his mistress, nursery school teacher Hazel Stewart - then Buchanan - and the subsequent murders of their innocent spouses has already attracted around 12 millions viewers across the UK so far.
