Audio CD review
Starring the voices of Peter Davison, Sarah Sutton
Big Finish
Release date Out now

Retracing Thomas Brewster's steps takes the Doctor and Nyssa to an anomaly within the Vortex...

Marc Platt's second contribution to the Doctor Who canon in the space of a month following The Doll of Death is another complicated puzzle, which has a certain resemblance to his first published original Who novel, Time's Crucible.

In that book, the TARDIS's dimensions are altered, and here Thomas Brewster's dismantling of parts of the console leads to an anomalous Time Reef in the Time Space Vortex. This isn't the easiest story to get your head round, but is well worth persevering with, as the various strands tie together.

A Perfect World allows Brewster's creator, Jonathan Morris, the opportunity to bring things full circle. It's another tale of alternate worlds and changed reality, like The Boy That Time Forgot, but this one is perfectly formed. Morris sets up the premise and resolves matters satisfactorily within the space of 25 minutes, including all the loose ends from The Haunting of Thomas Brewster and The Boy That Time Forgot. Peter Quentin

VERDICT: 7/10
The CD extras on side 2 explain the logic behind Brewster's short travelling time in the TARDIS, which will probably go down as an interesting experiment, if not an entirely successful one.