Miss Mardle (Amanda Abbington)
Selfridge's Head of Accessories is a beguiling character.
Clearly a confident, traditional woman with vast retail experience, Miss Mardle runs her department with naval discipline.
However, this formidable outward persona is at odds with her less successful private life: a clandestine affair with Chief of Staff Mr Grove brings Miss Mardle pleasure but much tension and heartache.
Will she ever be truly happy?