With less than a week to go until the Trigger Point finale, fans think they have worked out who is behind the bomb attacks in the ITV thriller.
If you haven't seen the latest instalment of the ITV drama, then consider this your spoiler warning, as this article will contain details about fifth episode which aired on Sunday, February 20.
The suspense-drama has had viewers on the edge of their seats all series but at the end of the penultimate episode, it seemed we were one step closer to finding out who was behind the bombings - or have we just been given another red herring?
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Lana Washington, played by Vicky McClure, was nearly killed in the latest episode when a bomb she was trying to neutralise was detonated in a university building - she only narrowly made it out before the explosion.
Her fellow expo John Hudson played by Kris Hitchen - who Lana has suspected all series is involved - had left the building to update the team waiting outside, but was then seen using a mobile phone to detonate the device inside and ran away from the scene.
Many viewers have said they think it's "too obvious" for John to be the culprit, with some adding that he could have been blackmailed or is undercover.
It seems many fans share the same theory that Lana's new love interest Karl Maguire, played by Warren Brown, is the main man behind the bombings and ringleader of 'The Crusaders'.
Here's some of the latest fan theories ahead of the finale:
Georgie Tranter posted: "Right so my theory of the week is the new fella she was seeing has something to do with it, and the boyfriend is going to die in the next episode, also I knew from the start that expo bloke had something to do with all of it #TriggerPoint"
"My bet is the failed bomb squad dude/brooding love interest is behind the reign of terror. Revenge for not making the grade. #TriggerPoint" Siobhan Duck said.
Julie tweeted: "Karl's the gang ringleader, for sure. #TriggerPoint Knew from the moment, at the funeral, during Episode 1, when he claimed to fail to get into Expo Team after leaving the Armed Forces. Envy and revenge."
"#TriggerPoint loving this show !! Change my guess every week … too obvious to be John still think he’s undercover" Sarah King added.
Simon H added: "I think John has been set up as the fall guy, Karl is too suspicious. #TriggerPoint"
"I’m going to be fuming if Karl is revealed as a bad guy. Still clinging onto the hope he’s not #triggerpoint" Laura Alice said.
But not all fans are pointing the finger at Karl, as some believe there are other suspicious characters which could later be revealed as the true mastermind.
Gina Gudgeon added: "Youngblood is my suspect. don't know what it is..but there's something about him! Great drama by the way #triggerpoint"
"#TriggerPoint I think john is being blackmailed and someone is wanting revenge on Lana. For something she’s done in the past," Callum Lewis tweeted.
#TriggerPoint it’s so obvious Karl is a baddy. Just stringing it out now," Georgie Simpson tweeted.
"I still think the bloke who said to Danny ‘don’t let them get to you’ or words to that effect in episode 1 is involved. I think he offered Wash a cuppa in the last episode #TriggerPoint" Emma added.
Towards the end of the penultimate episode, the bomb squad attended a street in London which had another device rigged to the gas line, meaning every building on the street was in danger. This seems to be the biggest threat they've dealt with so viewers can expect plenty of tense scenes to come in the finale.
The Trigger Point finale airs on ITV on Sunday, February 27 from 9pm.
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