Is Ashley Jensen returning as Agatha Raisin for series 5? Will there be a Christmas special?

Ashley Jensen was abandoned as a baby by her dad and has ‘a secret sister’ she hasn’t met

Ashley Jensen, who plays DI Ruth Calder, ‘doesn’t know if there’ll be another series of Shetland’

Shetland's Ashley Jensen's life off-screen from husband's tragic death to surreal Matthew Perry meeting