Colonel Kohler's house is the same one that served as Mr. Roark's residence in Fantasy Island (1977).
This is the final episode in which Phelps is warned of the consequences should any of the IMF force be caught or killed.
This is the first time Control (the voice on the tape) greets Phelps using his first name, "Jim." He typically uses "Mr. Phelps" in the greeting and closes with "Good luck, Jim."