Robert Vaughn as Napoleon Solo, David McCallum as Illya Kuryakin, Carol Lynley as Annie, Bradford Dillman as Luther Sebastian, John Dehner as Dr. Kharmusi
Taken from Episodes 4-4 and 4-5. The weapon was called a 'thermal prism' and was developed by a Dr. Kharmusi. It was used on an African village largely as a test as he has bigger plans. Solo and Kuryakin, along with a former associate of the crazed doctor, head to his island to stop him.