Drama: Harland Radio 4, 2.15pm

Lucy Catherine's supernatural thriller returns for a new five-part series, just in time for

Halloween. It's

16 months since

DI Sarah Ward disappeared into a sinkhole that swallowed a housing estate in the new town of Harland. Now, CCTV operative Dan (Tyger Drew-Honey, above) is determined to get to the bottom of it.

In Why Do We Do That? (Radio 4, 2.45pm) Ella Al-Shamah finds out why so many languages use words related to the heart to describe emotional pain.

Late Junction (Radio 3, 11pm) celebrates the Polish music scene with a mixtape from Warsaw-based cellist and composer Resina.