Lady Penelope and Parker pursue a pair of criminals who have been robbing stately homes of their valuables to the Tower of London, which they intend to blow up after taking the Crown Jewels.
Cast
Sylvia Anderson
Lady Penelope Creighton-Ward / Elaine Wickfen / Cynthia (voice)
David Graham
Gordon Tracy / Parker / Beefeater / Newspaper Vendor (voice)