You did go on to your own spin-off.
Yes, K9 and company, with that wonderful signature tune.
Looking back on that, do you think it had legs, or rather, wheels?
I don't think the pilot worked particularly well, because the setting was terrestrial rather than otherworldly, in space or whatever.
There wasn't really enough sci-fi about the fantasy, it was a little bogged down in the Cotswolds, so I don't think it had quite a strong enough identity as a true spin-off of Doctor Who. It became a story of K9 and his journalist friend.