Six Four (2023–)

Vinette Robinson

Michelle O\'Neill 4 episodes, 2023

Kevin McKidd

Chris O\'Neill 4 episodes, 2023

Nalini Chetty

DS Shereen Rahman 4 episodes, 2023

Richard Coyle

Robert Wallace 4 episodes, 2023

Andrew Whipp

Philip O\'Neill 4 episodes, 2023

Saskia Ashdown

Bryony Davis 4 episodes, 2023

Peter Hannah

Cameron 4 episodes, 2023

James Cosmo

Jim Mackie 4 episodes, 2023

Brian McCardie

Bill Martin 4 episodes, 2023

Frances Grey

Pauline Wallace 3 episodes, 2023

Alex Ferns

Gordon Byrne 3 episodes, 2023

Lorne MacFadyen

Stuart Simpson 3 episodes, 2023

Taqi Nazeer

Martin\'s Man 2 episodes, 2023

Patrick Robinson

Piers Fields-Turner 2 episodes, 2023

Eubha Akilade

Olivia O\'Neill 2 episodes, 2023

Kirsty Stuart

SCA Commander 2 episodes, 2023

Adam McNamara

SCA Dave Barr 2 episodes, 2023

Selin Hizli

Samantha Wishart 2 episodes, 2023

Rhona Cameron

SCA Alison Hamilton 2 episodes, 2023

Adam Harley

PC McKenzie 1 episode, 2023

Adrian Derrick-Palmer

House Keeper 1 episode, 2023

Eric Robertson

Sharon McNamara 1 episode, 2023

Scott Fletcher

Delivery Driver 1 episode, 2023

Marnie Baxter

Rector Beckett 1 episode, 2023

Laura Cairns

April McLean 1 episode, 2023

Andrew Keay

News Journalist 1 episode, 2023

Adrian Palmer

Detective unknown episodes