Suspects - Season 4 opens with the team investigating when a father stages a protest in an attempt to persuade the army into opening a search for his missing son, who has disappeared since returning from a tour of Afghanistan.

• Darren Fairhurst
• Steve Hughes
• Paul Marquess
• Newman Street
• Damien Molony
• Clare-Hope Ashitey
• Fay Ripley
• James Murray
• Lenora Crichlow
• Perry Fitzpatrick
• Suspects - Season 4