Despite Peter Collinson having assembled a pretty stellar cast for this adaption of the legendary Agatha Christie's story, the sum of the parts doesn't quite add up. All invited to spend the weekend at a remote island mansion, a group of ostensibly upright citizens are told that by their ethereal host (Orson Welles) that they are unlikely to survive the evening. Oliver Reed, and the triumvirate of off-form Elke Summer, Richard Attenborough and Gert Fröbe all try their best to keep it moving but the dialogue is poor and the pace of the film doesn't ever really work well enough to allow us to in...