Reference
OpenAI's Answer
BBV Productions has released a substantial number of audio series. Although the search did not yield a specific count, sources like the BBV Productions - The Time Scales page and the related Audio Adventures in Time & Space mention various releases over different periods.
BBV's "Audio Adventures in Time & Space" label, which ran from 1998 to 2004, includes four "seasons" of audio content. Additionally, the production company has an extensive back catalogue comprising at least 40 audio adventures and 20 video productions as per Doctor Who Merchandise.
For detailed collections, visits to specific databases or BBV's official site can provide comprehensive listings.
Follow Up
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