Sherlock Holmes (Peter Cushing) has retired. But when Alec MacDonald (Gordon Jackson) asks him to take on another case, he says yes. There have been some mysterious murders, and there are no visible causes for the deaths. At the same time Holmes gets this case, Graf Udo Von Felseck (Anton Diffring) gives him another case: find a young and missing Prince to prevent war between Germany and England. But Von Felseck is not as honest as he seems.

Starring:

Peter Cushing , John Mills , Anne Baxter , Ray Milland , Anton Diffring , Gordon Jackson , Susan Penhaligon , Marcus Gilbert , Jenny Laird , Russell Hunter , James Cossins , Eric Dodson , Georgina Coombs , James Head , Dominic Murphy

Genre:

Crime, Horror, Thriller, Mystery