Young socialite Iris Carr befriends an older woman while traveling solo by train. When Iris wakes from a nap, the woman is gone and other passengers claim she never existed.
Tuppence Middleton
as Iris Carr
Tom Hughes
as Max Hare
Keeley Hawes
as Mrs Todhunter
Julian Rhind-Tutt
as Mr Todhunter
Alex Jennings
as The Professor
Stephanie Cole
as Evelyn Floodporter
Gemma Jones
as Rose Floodporter
Selina Cadell
as Miss Froy
Jesper Christensen
as The Doctor
Daisy Lewis
as Diana
Benedikte Hansen
as The Baroness
Beatrix Biro
as Nurse
