Jemma Redgrave (Doctor Who, Holby City) plays DI Jill Raymond.Anna Burnett (Ripper Street) plays Frankie Stratton - Bob's daughter and member of a local environmental protest group.Edward Bennett (COBRA) plays Malcolm Coles - Hannah's husband.Dinita Gohil (Treason) plays Bela Nasir - a spirited journalist.Nicholas Gleaves (The Rising, Coronation Street) plays Bob Stratton - a wealthy local resident who has donated the land his estate stands on to the rail development project.Kirsty Hoiles (Rebel Cheer Squad - A Get Even Series) plays Hannah Coles - the mayor who pushed through the high speed rail development.Aislin McGuckin (Normal People) plays Aoife - Jack's sister and Cara's mum.Anjela Lauren Smith (EastEnders) plays Maggie Locke - Kai's mum.Darragh Hand plays Kai Locke - another festival goer who is questioned by the police.William Frazer (Almost Never) plays DS Trent.Christopher Staines (Quiz) plays John Davenport - one of Stars customers.Pooja Shah (EastEnders) plays Usha Jakhar - an agency nurse.

Bronte Terrell (Hollyoaks) plays Abby Prain - Jay's wife.

Julie Legrand (Footballers' Wives) plays Harriet Pugh - she runs a rehabilitation facility.

Rebecca Johnson (The Trip) plays Lucy Jenkins - Fiona and Sara's mum.

Jemma Moore (Two Doors Down) plays Mia Falshaw and Craig Miller (Professor T) plays Sean Jones - Jay's employees, who are questioned by the police.

Alastair Natkiel (Line of Duty) plays Gary Brandon and Daisy May Wood (War of the Worlds) plays Julie Switzoff - Jay's body was discovered in their tent.

Meena Rayann (Warrior Nun) plays DI Zara Abbas.

Amy Marston (The Hello Girls) plays Amy Nystrom - the CEO of the festival.

Bella Maclean plays Sara Mendes - Fiona's sister.

Hannah Rae (Broadchurch) plays Star/Fiona Mendes - a person of interest in the investigation.

Lewis Griffiths (Isolation the Series) plays Jay Prain - a businessman and former influencer who is found dead at a musical festival.

Aaron Garland plays the teenager who first discovers the abandoned lorry at the quarry.

Helene Maksoud (Coronation Street) plays Dr Bashir.

Jack Ryder (EastEnders) plays Frank Turner - one of the staff members at the halfway house where Will is living.

Nicole Sloane (Home Fires) plays Nurse Vi Froggat.

Muna Otaru (Broken) plays Sheila Shaw - her young son needs a heart transplant.

Ranhee Yoo plays Maya Park - she was in a relationship with Natia.

Sophia Carlo (The Undeclared War) plays Natia Beridze - one of the women who was found in the lorry.

Kate Robbins (After Life) plays Bev - she co-owned a nursery with Marcus.

Eoin Lynch (Fair City) plays Marcus Tillman - a drug dealer who was driving the lorry.

Josh Coombes (Country Lines) plays Will Sturton - a young man with an extensive criminal record that includes drug dealing and shoplifting.Like Ketevan, she is alive when the police discover her and is taken to hospital. Kate Bracken (Shetland) plays Lucy Stevens - another woman who is found in the back of the lorry.She is taken to hospital, where she eventually wakes up. Maria Forrester (Doctors) plays Ketevan Gvazava - a Georgian woman who is discovered in the back of the same lorry as Maeve.Lucy Black (The Durrells) plays Kerry Tooney - Maeve and Robbie's mum.Gus Barry (Hetty Feather) plays Robbie Tooney - Maeve's brother.Maisie Ayres as Maeve Tooney - a young woman who is found dead in the back of a lorry.Nadine Marshall (Sherwood) plays DI Sarah Torres.

Silent witness