Shetland (2013)

S4E1 Episode 1

After spending 23 years in prison, Thomas Malone's murder conviction is finally overturned, prompting DI Perez to revisit the case of Lizzie Kilmuir, a local teenager who was killed in 1994. This new development forces Perez to dig deeper into the investigation, uncovering old leads and secrets that could shed light on what truly happened all those years ago.