Five Have a Mystery to Solve 1964 S01E01

Episode: Whispering Island. The Five are invited to stay at a holiday cottage near the coast. There they meet and make friends with Wilfred, a boy with an almost magical knack of attracting animals. Offshore is Whispering Island where, according to Lucas, a former guardian of the island who now works at a golf-course on the coast, strange goings-on have been reported. The Five and Wilfred hire a boat and row across to the island where, despite the Five's resolve to avoid adventures, they find themselves stranded. Wilfrid has discovered that someone is stealing the island's old treasures.