The 3 x 60-minute drama, written by David Pirie and directed by Catherine Morshead, stars the previously announced Robbie Coltrane.
Lucy Cohu, Nicholas Gleaves, David Westhead, Andrew Tiernan and Bel Powley are also confirmed for the project, which features one murder told from three different perspectives.
"Robbie Coltrane heads a marvellous cast and combining the talents of David Pirie and Catherine Morshead on this project is a delicious prospect," said producer Kate Croft.
"Murderland promises to be as much a why-dunit as a whodunit. As much a love story as a murder story."