McTeer plays police detective Amy Foster in the crime drama, which was directed by Otto Bathurst and Simon Curtis from a script penned by Gwyneth Hughes. The four other parts of the miniseries — produced by Paul Rutman and executive produced by Curtis and Hilary Salmon — will debut Oct. 9, 16, 23 and 30 at 8 PM ET.

The starry company also includes Christine Tremarco as Leanne Wellings, David Oyelowo as Matt Wellings, Lee Massey as Ethan Wellings, Tyler Anthony as Rosie Wellings, Lucinda Dryzek as Tanya Wellings, Patrick Malahide as John Poole, Penelope Wilton as Barbara Poole, Edward Woodward as Grandad Vic Marsham, Sarah Smart as Sarah Wheeler, Hugh Bonneville as DSI Barclay, Nikki Amuka-Bird as PC Simone Farnes, Michelle Bonnard as Defne Topcu, Charlie Creed-Miles as DC Stephen Beam, Al Weaver as Josh Fairley, Phil Davis as Mic Danes and Rory Kinnear as Kyle Betts.

"Five Days," according to press notes, "revolves around the mysterious disappearance of a beautiful young mother in the family-friendly suburbs of Hertfordshire, outside of London, and the strange, inexplicable circumstances that leave her children abandoned far from home. Focusing on the day of the woman's vanishing and four random days that follow, the story traces the ripple effects felt by her family, the police and the media during the course of the 72-day investigation. The miniseries presents an eerie picture of modern life in southeast England, where stately homes of multiple generations co-mingle with modern architecture and the throbbing new beat of a city in flux, and where a family's life-altering trauma becomes not only a complex police investigation, but ripe fodder for tabloid headlines."

In a statement HBO Films president Colin Callender said, "'Five Days' is a brilliant piece of writing that goes the behind the scenes of a tabloid crime and explores the emotional impact on the family of the victim and the investigators. Each of the five hours captures a watershed day in the investigation and its fallout effects on the lives of those involved. We are thrilled to be a part of this intriguing project and continue to enjoy our creative collaboration with BBC."

For more information visit HBO Films online at hbo.com/films/fivedays.