The group formed by
Joel Hodgeson,
Trace Bealieu, and
Jim Mallon (among others) for the production of the show which came to be
MST3K. As was later revealed, all other cast members, including
Kevin Murphy and
Mike Nelson, were only employees of BB (even though they were always known, collectively, as "the brains").
BB now consists of, basically, Jim, Beez, and a couple of records keepers. Their only current purpose is to sell off the remaining MST3K merchandise.
After that...?