New noir thriller Smother, starring Dervla Kirwan and Seána Kerslake and filmed in Lahinch, County Clare, debuts om RTÉ One on March 7th and we've got a sneak preview of the new drama for you to watch.

Kirwan (The Stranger, White Dragon) plays family matriarch Val Ahern - a devoted mother who is determined to protect her family and particularly her three daughters Jenny, Anna, and Grace, at any cost.

We need your consent to load this YouTube contentWe use YouTube to manage extra content that can set cookies on your device and collect data about your activity. Please review their details and accept them to load the content.Manage Preferences

Jenny is a heavily pregnant single doctor, unsure of the choices she has made, played by Niamh Walsh (Good Omens, Jamestown).

Grace, played by Kerslake (Can't Cope, Won’t Cope, The Hole in the Ground), is an angry but fragile young woman struggling with mental health issues. Anna is a devoted stepmother to two teenage boys, whose birth mother has recently reappeared on the scene, played by Gemma-Leah Devereux (Judy, The Tudors).

Dervla Kirwan in Smother 

When Val Ahern’s husband Denis, played by Stuart Graham (The Cure, Hunger), is found dead at a foot of a cliff close to their home the morning after a family party, Val begins to interrogate the events that unfolded the night before.

Val explores Denis’s relationships with his children, stepchildren, and his siblings in order to find out who might have been responsible for his brutal, shocking death.

The deeper Val delves into her family’s secrets, the more she realises how her late husband’s controlling, manipulative behaviour had a deep effect on each member of the family.

The cast also includes Thomas Levin (Borgen), Hilary Rose (The Young Offenders) and Justine Mitchell (Cheat).

Written by Kate O’Riordan (Mr Selfridge, The Bay), Smother starts on RTÉ One on Sunday March 7th at 9:30pm.