Question: How could the murderers possibly have known which swimwear Arlena would be wearing and have exactly the same costume?
Evil Under the Sun (1982)
1 question
Directed by: Guy Hamilton
Starring: Maggie Smith, James Mason, Peter Ustinov, Colin Blakely, Jane Birkin, Nicholas Clay
Continuity mistake: When Poirot and the others get ferried to the island the pile of luggage at the bow is arranged differently when they arrive. (00:15:30)
Daphne Castle: The whole world knows that you are a man of enormous discretion.
Answer: They didn't. They dragged her into a small enclave and stripped off her bathing suit. The wife put it on and pretended to be Arlena sunning herself.