I do believe that from my days of thumbing through the old Letraset catalogue that the typeface is actually called Countdown.
According to my Letraset catalogue, it's the type that says 'Do Flying Saucers Exist' that's actually called Countdown... close! Not sure about the logo itself though.
Having said that and checked again - it is 'Countdown' - except it's been emboldened. So you were right!
Your comments are very welcome!