A lovely nostalgia filled celebration of the show - stuffed with visual references and call backs, in a loving tribute. It's not the best paced or most unique story, but it certainly is a lovely celebration of the show.

Is this technically the best crafted story ever? No. But it’s a JOY of a 30th anniversary story, in absence of a show on air, wrapping its hands around Doctor Who’s entire history and adding a little extra history on top.

The keys of time device allows Ace, Benny and The Doctor to drop in with each of The Doctor’s to save the day.

I would say though… is the villain’s plan all that clearly defined? And does it matter?