The missing episodes of The Reign of Terror were animated by animation company Theta-Sigma, in collaboration with Big Finish, and became available for purchase in May 2013 through Amazon.com.
De manglende episoder af The Reign of Terror blev animeret af animations-kompagni Theta-Sigma, i samarbejde med Big Finish, og blev sendt ud til køb i Maj 2013 gennem Amazon.com.