99 reports from the "ship of spies" using the hairdryer phone.
Radio-telephone concealed in a ladies' portable hairdryer.
The dial is located within the case, the headphones are in the headpiece and speaking is into a handheld microphone.
The Chief takes 99's call at his desk.
Back at CONTROL headquarters, the Chief is able to use a similar device but without the disguising paraphernalia.
[Episode #28: "Ship of Spies, Part 2".]