At the end of the episode the announcer tells Barkley that the money is in the back of the radio. Earlier the Professor had the entire radio opened trying to fix it. If there was ten thousand dollars in the radio he would certainly have seen it.
George Barkley steals several items from the castaways in order to survive on the island for a week. It appears that he also stole a framed glamour shot of Tina Louise/Ginger Grant.
Dawn Wells does not share one scene with guest star Strother Martin.