She plays Sapphire in Big Finish Productions' audio revival of Sapphire & Steel, produced as a series of CD plays in 2005, with a second series following in 2006/7. Earlier in 2003 she played Clare Keightley in the audio version of the Doctor Who adventure Shada, alongside Paul McGann.

Her sister, Caroline Harker, is also a TV and stage actress.

She was married to Iain Glen from 1993 to 2004. They have one son, Finlay. In 2006, she began a relationship with Paul McGann.