Classic Villains Trilogy
From Tardis Wiki, the free Doctor Who reference
The Classic Villains Trilogy was a loosely connected trilogy starring solo Fifth, Sixth, and Seventh Doctors battling well known Doctor Who enemies in Omega, portrayed by Ian Collier, Davros portrayed by Terry Molloy, and The Master, played by Geoffrey Beavers. This was a part of Big Finish's Monthly Adventures and ran from August-November, 2003, and was the prelude to the 40th Anniversary, Zagreus. All three audios in the trilogy were given away in Doctor Who Magazine issue 547 as a promo.