Chronological placement:
Fifth Doctor: between the TV adventures The Five Doctors and Warriors of the Deep.
Sixth Doctor: between the TV adventures The Trial of a Time Lord and Time and the Rani.
Seventh Doctor: before the 1996 Doctor Who TV Movie.

Colin Baker said: "Way back in the midst of time, in another century, my dear friend Gary Russell said, ‘There’s this company I’m working for called Big Finish and we want to do Doctor Who audios. Do you fancy that?’ It sounded rather good, and as my Doctor had been rudely interrupted, I thought, well, I’ll certainly go for that.

"Big Finish kept the programme going when it was off the air – Nicholas Briggs and Jason Haigh-Ellery and everyone that’s worked there have kept Doctor Who in the consciousness of the British public. So we owe them a lot."

Peter Davison added: “I was always very happy to do things to do with Doctor Who, and this seemed another branch. And of course, it had the advantage that you couldn't see us, and therefore you could imagine that we were still at the ages we were when we were Doctor Who!

"The thing about The Sirens of Time was, we didn't really think it was a beginning – you can only know this in hindsight. But from that, a few months later, they came back and said, we want to do the individual Doctor Who stories."

And Sylvester McCoy said: "When was it? 1066, as far as I'm concerned. It was a long, long, long, long, long time ago, back in the days of black and white, when we recorded it! It was brilliant. The Sirens of Time started it all off brilliantly.

"Being an actor, I just thought, ‘Oh, that's it, it'll finish,’ because everything one does as an actor comes off in the end. But this one hasn't so far. All these years later. Wow. Wonderful. Still trying to save the universe."

Colin Baker, Sylvester McCoy and Peter Davison (1999)

Jason Haigh-Ellery and Gary Russell being interviewed (1999)

Nicholas Briggs with the CD release of The Sirens of Time (1999)