Here are the Tom Baker audios I own for your perusal, listed in release order. I will include the 4th Doctor adventures as I get to them.
Tom Baker (1934-present) -- the fourth Doctor from 1974-1981 -- http://en.wikipedia.org/wiki/Fourth_Doctor
BBC Audio
This is the only one I own
Genesis of the Daleks/Exploration Earth 
Big Finish Audios
The Warren Legacy (short trip)
The Fourth Doctor by Gareth Roberts
Season 7 - Fourth Doctor Adventures
7.1 - Sons of Kaldor
7.2 - The Crowmarsh Experiment
7.3 - The Mind Runners
7.4 - The Demon Rises
7.5 - The Shadow of London
7.6 - The Bad Penny
7.7 - Kill the Doctor
7.8 - The Age of Sutekh