Exclusive: Tracy-Ann Oberman to guest in 'Doctors'

Former EastEnders and Doctor Who actress Tracy-Ann Oberman is to make a guest appearance in BBC daytime medical drama Doctors.

The 40-year-old, who is most noted for her role as Walford's murderous Chrissie Watts, takes on the role of Cathy Harley, a woman known to locals as 'Letherbridge's Black Widow' as her previous two husbands have died in suspicious circumstances.

A reluctant Cathy takes her latest groom Derek to The Mill after he complains of headaches and nausea. Heston quickly diagnoses food poisoning but when Julia reveals Cathy's ominous marital past, he decides to stop by on a home visit.

While there, Derek's daughter Helen - Cathy's daughter-in-law - is convinced that Cathy's trying to poison her father. With the mystery surrounding her late husbands Colin and Terry's deaths hanging over her, Cathy is forced to come clean about the true circumstances of their untimely demises.

Oberman's episode, titled 'The Black Widow', is due to air on Tuesday, September 29 at 1.45pm on BBC One.

She previously appeared as Lynne Preston in a 2004 episode titled 'Two's Company'.

In July, Oberman told DS that she would like to return to EastEnders "to finish off Chrissie's story".

> Click here to read our exclusive interview with Tracy-Ann Oberman