Due to the BBC's policy of junking episodes in the 1970s, this episode no longer exists in the archives. Several clips survive in the form of an 8mm home movie reel shot off a television set. They are: four seconds of Barbara in her cell talking to the Doctor about regretting having taken Susan to see the physician; three seconds of Barbara remarking on the Doctor's Regional Officer of the Provinces disguise; one second of Ian talking in the surgery; two different one second shots of the Doctor talking; and one second of Ian and Barbara in Jules' house, surprised by Lemaitre's entrance. These clips are included on the "Doctor Who: Lost in Time" DVD box set released in 2004.
Although a copy of this episode had also been held in Cyprus, it was destroyed in the 1974 Turkish invasion of Cyprus.
This episode takes place in France in July 1794.
This episode was watched by 6.9 million viewers on its original transmission.