Alex Kingston said: “We have gone post-Library! We’ve done another episode in the past where I was within the database, which I loved, and I thought that’s the only way you could go forward with River, given her situation. So, I was actually really surprised when this box set came my way, and that we are now so far advanced in the history of Earth that she is able to be brought out as data and put into a cloned body. So very, very clever!”

Producer David Richardson added: “When every single day during the recording, your leading actress says “This script is brilliant”, you know you’re onto a good thing. Even better, at the end of the last day, Alex popped the script in her bag and announced that she loved Last Words so much she was taking it home to keep and treasure.”

Alex Kingston in the Soundhouse recording studio