President Putin decries "betrayal" and "treason" after a dramatic challenge by the chief of the Wagner mercenary force, Yevgeny Prigozhin.
Russia editor Steve Rosenberg, Security correspondent Frank Gardner and broadcaster Gabriel Gatehouse try to make sense of a moving and murky situation in Russia.
Today’s extra episode is presented by Victoria Derbyshire and Vitaliy Shevchenko.
The series producer is Tim Walklate. The senior news editor is Sam Bonham.
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