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ITV crime drama Trigger Point has made its comeback for a third series with Vicky McClure returning as bomb disposal expert Lana Washington. The latest series, which includes Jason Flemyng in the cast, follows Lana and her colleagues as they probe a bomb threat that quickly emerges as the beginning of a dark vendetta: someone is hunting down individuals and seeking retribution. Collaborating with the Police Counter Terrorism Unit, the Bomb Disposal Squad battle against the clock to locate the bomber before they strike their next target. Within moments of Sunday's series premiere - which can also be streamed on ITVX - viewers were flocking to social media to express their delight at its comeback. One viewer commented: "Love a #TriggerPoint return on a Sunday evening.", reports the Express . Another declared: " It's time for #TriggerPoint I've been looking forward to this all week." A further fan wrote: "Been waiting for this! #triggerpoint." A fourth enthusiast remarked: "So excited #TriggerPoint." Hinting at Lana's mental state in the third series, Vicky McClure revealed: "She's not coping. Lana is a strong person, and she likes to see herself as a perfectionist, but I think we very quickly see that's starting to crumble. "We know from the previous two series that she has experienced a lot of loss, which was always going to catch up with her eventually, and this is the start of it. "So we are going to be dealing with PTSD, plus she's struggling with tinnitus , and she is relying on medication to get her through. She's quite a lonely character at the beginning of the series." Jason Flemyng, who plays Steven Wyles in the ITV show, is a new addition to the cast this year, portraying a character who seems to have had enough of the system. Ahead of the series, the actor shared some insights about his character: "The truth is, he's another little man that's fighting the system and has been hard done by. "In his head, the catalyst system and profit before people, he's had enough and he takes retribution. "He's not without reason, and Vicky's character isn't battling him politically or emotionally; it's just that he's breaking the law and doing something that puts other people in danger. So, that's the essence of their relationship, I think." Trigger Point is available on ITV1 and ITVX.