The master videotape was wiped by the BBC in 1967. No footage is known to survive. However, director Waris Hussein passed a complete set of telesnaps to the BBC archives in 2004.
All the episodes from this story are currently lost.
Telesnaps and extracts from the original soundtrack, are included as part of a 30-minute abridged reconstruction of the story "Marco Polo". This is included as part of "Doctor Who: The Beginning" DVD collection released in January 2006.
This episode takes place in China in 1289.
Whilst a number of Doctor who Stories are missing episodes, many of them feature clips either recovered or in 8MM home movie format, this is one of three stories where no footage survives (excluding the reprise from The Edge Of Destruction), the other two are Mission to the Unknown and The Massacre.