Professor Soames has invented an ultrasonic vibrational rifle that is capable of obliterating armoured vehicles. Intending to use the weapon to shoot down an experimental aircraft, criminal Mark Slater and his gang kidnap Soames' daughter, Anne. With the professor's assistance, Unwin and Harding rescue Anne and set out to thwart the plot.
Cast Appearances
Gary Files
voices Matthew HardingJeremy Wilkin
voices The BishopKeith Alexander
voices Agent BlakeSylvia Anderson
voices Mrs. ApplebyEpisode Discussion
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