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| Año | Título | Personaje | Valoración |
|---|---|---|---|
| 2018 | The Interrogation of Tony Martin | Hilary Martin (voice) | ★★★☆☆ |
| 2017 | Jan Masaryk: la traición de Múnich | Mrs. Fitzgerald | ★★★☆☆ |
| 2016 | Nigel Farage Gets His Life Back | Margaret | ★★☆☆☆ |
| 2015 | La batalla por Sebastopol | Eleanor Roosevelt | ★★★★☆ |
| 2014 | Doctor Who: Dark Water / Death in Heaven | Woman | ★★★★☆ |
| 2012 | The Sweeney | Landlady | ★★★☆☆ |
| 2005 | Doctor Who | Woman | ★★★★☆ |
| 2003 | Blue Murder | Pathologist | ★★★☆☆ |
| 2002 | Spooks (Doble identidad) | Opera Woman | ★★★★☆ |
| 2001 | Back Home | Miss Bembridge | ★★★☆☆ |
| 2001 | El diario de Bridget Jones | Shirley | ★★★☆☆ |
| 2001 | Judge John Deed | ★★★☆☆ | |
| 2001 | Judge John Deed | Lady Vera Everard | ★★★☆☆ |
| 1997 | Los asesinatos de Midsomer | Maureen Stubbs | ★★★★☆ |
| 1995 | The Plant | Rosemary | ★★☆☆☆ |
| 1992 | As Time Goes By | Angry Woman | ★★★★☆ |
| 1988 | The Zip | The doctor | ☆☆☆☆☆ |
| 1988 | Hannay | ★★★☆☆ | |
| 1987 | Inspector Morse | Helen Buscott | ★★★★☆ |
| 1987 | A Small Problem | ★★★☆☆ | |
| 1986 | Chocky's Challenge | Mrs. Gibson | ★★★☆☆ |
| 1986 | Lovejoy | Golfer | ★★★★☆ |
| 1986 | El desafío de Chocky | ☆☆☆☆☆ | |
| 1986 | Casualty | Mrs. Wheeler | ★★★☆☆ |
| 1985 | Plenty | Miss Simpson | ★★★☆☆ |
| 1985 | Home to Roost | Fiona Fennell | ★★★☆☆ |
| 1984 | The Bill | ★★★☆☆ | |
| 1982 | Brookside | ★★★☆☆ | |
| 1981 | Take a Letter, Mr. Jones | ★★☆☆☆ | |
| 1968 | The Merry Widow | ★★★☆☆ |
Películas destacadas de Joan Blackham
Estas son las películas más destacadas en las que ha trabajdo:
Series
Las series más importantes en las que ha participado son las siguientes:
