It's traditional that decadal anniversaries of
Doctor Who
feature multi-Doctor stories. For the 50th, on TV we got The Day of the Doctor, while on audio, we got this. (Interestingly, according to the sleeve notes, the producers had decided not to bother this time round, but Tom Baker apparently talked them into it, making this the first multi-Doctor story he'd properly appeared in).
A time distortion emanating from when else but the time and date of the TV show's first broadcast traps the TARDIS, pulling it into a pocket universe. As is clear from the cover, the story primarily involves the fourth to eighth Doctors, but there are also cameos from the first three, using a plot device that means we can never quite hear them clearly (thus disguising the fact that they aren't voiced by their original actors).
The story is a complex one, as one might expect, and quite a bit better than the novel The Eight Doctors that kicked off the BBC Books range back in 1997 - or, indeed, the audio story Zagreus, which celebrated the 40th anniversary. Since he's also on the cover, it's no surprise that the Master is involved in it all, but the story also brings in interstellar arms dealers and events at a suburban house in Hampshire. Despite the large number of characters, all of the Doctors get a good share of the spotlight, although the five featured companions are a little more side-lined.
Quite why it's all happening is rather harder to follow at times, although it does all make sense in the end. Along the way there are plenty of nods to past stories which, in fairness, may reduce the appeal to casual fans or those who follow the new series alone - they're not essential to the plot, but part of the fun is spotting them. Naturally, there's also the enjoyment of seeing different Doctors and companions interact, which, again, does require you to be familiar with who they all are.
Normally, BF releases use the theme tune of the relevant era, but, in the case of this pan-era release, they've created a new variation. It's rather good, and to my mind, feels like a mixture of the themes for the Eighth and Tenth Doctors. That it's two one-hour episodes, rather than four half-hour ones, also adds to the "special" feel.
Is it perfect? No, but it's everything you want from a big multi-Doctor team up, a story that's clearly celebrating the show down the years. It's aimed straight at the long-term fan, and merely the fact that it unites so many of the 'classic' Doctors, still played by their original actors, is a delight in itself. One for the fans, to be sure, but definitely a good one.