- The Three Urns
2026 Deirdre
- And Mrs.
2024 Lorraine
- National Theatre Live: People, Places and Things
2024 Doctor/Therapist/Mum
- Napoleon
2023 Letizia Bonaparte
- The Baby
2022 Barbara
- North Sea Connection
2022 Moira Kenny
- MotherFatherSon
2019 Maggie Barns
- Beast
2018 Penelope
- National Theatre Live: King Lear
2018 Kent
- Marcella
2016 Sylvie Gibson
- Queen & Country
2015 Grace Rohan
- Stonehearst Asylum
2014 Mrs. Pike
- 37 Days
2014 Margot Asquith
- The Sea
2013 Anna Morden
- Wrath of the Titans
2012 Clea
- Camelot
2011 Sybil
- The Deep
2010 Meg Sinclair
- Cracks
2009 Miss Nieven
- A Room with a View
2008 Miss Lavish
- Eastern Promises
2007 Helen
- A Room with a View
2007 Miss Lavish
- V for Vendetta
2006 Delia Surridge
- The Tiger's Tail
2006 Oona O'Leary
- Mathilde
2006 Wife of Col. De Petris
- Home Again
2006
- Dad
2005 Sandy James
- Summer Solstice
2005 Elfrida
- The Strange Case of Sherlock Holmes & Arthur Conan Doyle
2005 Mary Doyle
- North & South
2004 Hannah Thornton
- I Capture the Castle
2003 Mrs Cotton
- Winter Solstice
2003 Elfrida Phibbs
- Winter Solstice
2003 Elfrida Phibbs
- Dream
2001 Kathleen
- My Mother Frank
2000 Frances 'Frank' Kennedy
- Passion of Mind
2000 Jessie
- The Nephew
1998 Brenda O'Boyce
- Food for Ravens
1997 Jennie Lee
- Midsomer Murders
1997 Stella Harris
- Have Your Cake and Eat It
1997 Charlotte Dawson
- Stealing Beauty
1996 Diana Grayson
- Uncovered
1995 Menchu
- Oliver's Travels
1995 WPC Diane Priest
- Sparrow
1994 Matilde
- The Cement Garden
1993 Mother
- Bad Behavior
1993 Ellie McAllister
- Waterland
1992 Mary Crick
- Tales from Hollywood
1992 Nelly Mann
- God on the Rocks
1992 Ellie Marsh
- Performance
1991 Nelly Mann
- The Hen House
1989 Lily
- Venus Peter
1989 Miss Balsilbie
- Agatha Christie's Poirot
1989 Mrs. Amy Folliat
- Rocket Gibraltar
1988 Amanda 'Billi' Rockwell (as Sinead Cusack)
- ScreenPlay
1986 Lily
- Cyrano de Bergerac
1985 Roxanne
- Screen Two
1985 Mother
- American Playhouse
1982 Nelly Mann
- Twelfth Night
1980 Olivia
- The BBC Television Shakespeare
1978 Olivia
- The Kitchen
1977 Monique
- The Last Remake of Beau Geste
1977 Isabel Geste
- BBC2 Play of the Week
1977 Monique
- Supernatural
1977 Leonora
- Romance
1977 Ermine
- Love's Labour's Lost
1975 Rosaline
- Quiller
1975 Roz
- The Playboy of the Western World
1974 Margaret Flaherty (Pegeen Mike)
- Notorious Woman
1974 Marie Dorval
- Affairs of the Heart
1974 Bessie Alden
- Horowitz in Dublin
1973 Liz
- The Eyes Have It
1973 Sally
- Thriller
1973 Sally
- The Protectors
1972 Anne Ferris
- Scoop
1972 Katchen
- Revenge
1971 Rose
- The Persuaders!
1971 Jenny Lindley
- Stage 2
1971 Minnie Powell
- Hoffman
1970 Miss Smith
- The Ballad of Tam Lin
1970 Rose
- A Sound from the Sea
1970 Catherine
- The Dolly Scene
1970 Anna
- The Rise and Rise of Michael Rimmer
1970 Yvonne (Uncredited)
- Menace
1970 Sylvia Terry
- The Sinners
1970 Polly Donegan
- David Copperfield
1969 Emily
- ITV Playhouse
1967 Mary
- BBC Play of the Month
1965 Lady Rosaline
- Armchair Theatre
1956 Amora
