'The Faceless Ones' is a 1960s 'Doctor Who' story, in which not all of the episodes survive in the BBC archive. Recently, the story, with newly animated episodes using the surviving soundtrack, has been released on BluRay.
The newly animated episodes contain a sneaky but deliberate 'Prisoner' reference, with a plane passenger seen wearing a Number Six blazer! In the on-screen notes regarding such 'Easter Eggs', the animation team reference this as a nod to 'The Prisoner'. The story features 'Prisoner' actors Colin Gordon and Wanda Ventham in prominent roles.
With thanks to Jamie Hartley Cowan for this news item and screenshot ((c) BBC Enterprises) . Additional info: Andrew Frith.