First broadcast 28th October 1970.
An attractive Russian ballerina from a visiting ballet company goes missing.
Derren Nesbitt ... Det. Chief Insp. Jordan
Fulton Mackay ... Det. Chief Supt. Inman
Morris Perry ... Charles Moxon
Nicola Pagett ... Lydia Tamarova
Rachel Herbert ... Ilena Petrova
Brian Wilde ... Alan Pritchard
Brian Haines ... Leonid Rubin
Milos Kirek ... Galyavitch
Sheila Ruskin ... Sheila Franklyn
Roger Kemp ... Peter Simmons
Ron Hickey ... Kilyagin
