DS Lisa Armstrong is assigned as the Family Liaison Officer to the case of two missing teenage twins, but discovers she might have a personal connection to the case.
With the Meredith family reeling from Dylan's death and Sean's arrest, Lisa is charged with finding his alibi and makes a game-changing discovery.
When main suspect Nick goes missing, Lisa is concerned about Sean's possible involvement. The discovery of a key piece of evidence provokes a number of new theories.
With Nick seriously injured in hospital, Lisa furiously seeks out Sean, whilst Med feels increasingly sidelined.
A confession shines a possible new light on Dylan's killer. Abbie has a terrifying experience with some local junkies, while Med begins his own investigations.
Despite Holly's confession that she killed her brother, the team are convinced there's more to the story than she's telling them.
After dealing with the repercussions of her actions from last year, DC Lisa Armstrong is given the opportunity to step up when asked to assist a murder investigation in Morecambe.
Determined to ignore Andy's unexpected arrival the night before, Lisa throws herself into the case and discovers a significant lead from an eyewitness.
As the team press on with the investigation, Lisa and Med dig deeper into the family and discover not all relationships with the victim were amicable.
Following an unexpected turn in the case, Lisa and the team struggle to keep their heads in the game as they're forced to accept help from a new unit.
A rash decision unsettles Lisa, so throwing herself into her work, she pursues a new line of investigation, uncovering a secret with far-reaching consequences.
As a confession brings the team closer to the truth, Lisa identifies a suspect but conflicting accounts leave her questioning who to believe.
DS Jenn Townsend, Morecambe's new Family Liaison Officer, is immediately thrown into the deep end when a body washes up in the bay on her first day on the job.
An uncooperative suspect causes difficulties for the team, and a frustrating turn in the case causes tensions to rise within the community, leading to an unexpected altercation.
Several major developments in the case point the team towards suspects in surprising places. Meanwhile, Erin offers an olive branch to Conor.
It's the day of Saif's funeral, and as Jenn watches closely for any suspicious behaviour, divisions within the Rahman household widen.
Shazia's explosive revelation threatens to destroy the Rahman family. The police investigation grinds to a halt until a vital clue offers a glimmer of hope.
Jenn remains determined to find out the truth about Saif's murder. With one suspect arrested, the race is on to find the missing pieces of the puzzle before the killer escapes.
Jenn is working late when an emergency is called in - she races to the scene to find horror unfolding for a broken family... and must now uncover the truth behind it.
The Morecambe community rallies around the grieving Metcalf family, but Jenn and the MIU team find key evidence that all was not well in their home.
The Metcalf kids struggle to cope with their loss, Dean surprises Jenn by pushing to return to work, and some CCTV evidence leads to a major development in the case.
Dean is confronted with another life-changing event, but Jenn loses sight of troubles with her own family when she fears that Dean will do something that he regrets.
An old case puts a stop to Dean's work plans and awakens insecurities for Manning that cause him to have second thoughts about his future in the force.
A furious Jenn is determined to prove who attacked her family while being forced to focus on the cases in hand in the meantime, and Manning ponders his future.
DS Jenn Townsend has just returned to the MIU following her father's death, but she has to put her own grief aside when a new case challenges the team.
When the victim's boyfriend is found near death, Jenn struggles to keep her FLO relationships intact when the family she is helping start to implicate each other.
Craig's lies unravel as he attempts to explain his whereabouts, the Morecambe community want reassurance that they are safe, and the pressure on the MIU intensifies.
A vital clue leads the MIU to look again at Hannah's family, but Manning's frustrations reach an all-time high when red tape stops the team in their tracks.
A new SIO is called in to lead the MIU, the team struggles to adapt to a new way of working, and Jenn's family feel the full force of the grief she's been containing.
The team discover that someone close to Hannah has been withholding information from them - as they piece together the truth, Jenn is left contemplating her future.
