The cornea grafts that will, hopefully, restore the sight of blind millionaire Marten Halvarssen fascinate Steed: they're rumoured to be coming from a live patient, one Hilda Brauer. Steed suspects that all is not what it seems and so sends Cathy to Switzerland to oversee the operation.
Elenco: Patrick Macnee , Honor Blackman , Diana Rigg , Linda Thorson , Ian Hendry .