Read my full review on my blog:
The Time Traveller’s Companion is a massive 240-page tome full of information about time travel, Time Lords, TARDISes, and more. Pretty much everything to do with time and its potential use in-game gets discussed in quite a lot of detail. Most of the book is descriptive detail, from a complete history of Gallifrey to temporal mechanics and space-time phenomena. Adventures in Time and Space is a rules-light game and this book maintains that, but that doesn’t mean there aren’t any new rules elements here. These are mostly in the form of new traits (particularly Time Lord and gadget traits) and new gadgets, but there are also detailed rules for piloting TARDISes, regeneration, and more. I’m actually extremely impressed by just how much detail there is in the book. It has definitely made the long wait worth it.
[5 of 5 Stars!]