Producer David Richardson said:
UNIT: Dominion is a massive story. The script was enormous and we realized when we were making it that it’s actually the same length as The Invasion. But it needed to be that long to tell a tale of such scope, which crosses between multiple dimensions.
To count down to the release, Big Finish have released a number of digital postcards, such as the ones below which feature the Seventh Doctor, Raine, the Other Doctor, Sergeant Pete Wilson, the Nexus, the Skyheads and the Mind Leeches.
The boxed set can be pre-ordered on its own, or as part of a fifteen disc bundle from Big Finish with productions Love and War, Dark Eyes, Voyage to Venus and Voyage to the New.