Happy Valley's director, Fergus O'Brien, has heightened anticipation for the final episode even further, by confirming that the BBC drama will have a 'rollercoaster' ending.
As soon as it made its debut in 2014, Happy Valley became a huge ratingts winner for BBC One, as viewers were immediately invested in the exploits of Sarah Lancashire's on-screen alias, Sergeant Catherine Cawood and the many trials and tribulations she had to contend with on the beat and in her private life.
While there have been sub plots, such as one of her colleagues killing a woman he was having an affair with in series two, the back bone to Happy Valley's action has been the bitter war between Catherine and her sworn enemy, Tommy Lee Royce, the villain who raped and impregnated her young daughter Becky, with her later taking her own life after giving birth to son Ryan.
READ MORE: Happy Valley to get extended finale as BBC confirm schedule change
Catherine's desperate battle to keep Tommy away from Ryan was dealt a brutal blow at the end of series three's fourth episode, when Tommy managed to break free from court and evade capture. With him still at large and making contact with now teen ager Ryan via an online game in episode five, just how Happy Valley's final episode will end is anyone's guess, especially as it's been widely reported that a number io different endings have been filmed.
One person who knows how things will turn out is Fergus and, speaking on Shrine Podcasts, he has assured there will be an epic conclusion, as huge audience is expected to tune in at 9pm on Sunday, February 5.
He teased:: "You can expect to be thrilled. I literally can't tell you anything plot-wise because I would be hunted down probably.
"But it's really exciting. I've re-watched it recently for some reason or other and I remember looking at the time code and I was 16 minutes in and I couldn't believe how much stuff has happened."
Fergus added that he thinks people will be 'sad but satisfied' as things wrap up, continuing: "It's a rollercoaster. It picks you up and flings you around and slaps you against the wall, slaps you in the face and wallops you across the room.
"It really takes you on a ride and the ending is really satisfying. It's dramatic but in a really interesting and clever way."
As credits roiled on last Sunday's penultimate episode, many fans at home became cionvi8nced that there would be at least one de4ath in the finale, with Tommy, Catherine and her sister Claire the three identified as being most under threat, particularly after Catherine's savage verbal assault on her sibling, as he struggled to comprehend how she could betray her by taking Ryan to see dad Tommy in prison.
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