Arvoitusten juna was released in the year 1976。Arvoitusten juna is also called as The Seven-Per-Cent Solution, Sju-procentiga lösningen, Sherlock Holmes: soluzione settepercento, Sherlock Holmes mystiska försvinnande, Sherlock Holmes attaque l'orient-express, Kein Koks für Sherlock Holmes。

Concerned about his friend's cocaine use, Dr. Watson tricks Sherlock Holmes into travelling to Vienna, where Holmes enters the care of Sigmund Freud. Freud attemts to solve the mysteries of Holmes' subconscious, while Holmes devotes himself to solving a mystery involving the kidnapping of Lola Deveraux.

Arvoitusten juna actors and actresses include Alan Arkin, Joel Grey, Laurence Olivier, Vanessa Redgrave。