By @astronomyblog & @LoveGraphs. Stats last updated 7 February 2016.
It seems there may have been at least 25 shows and 125 listed appearances. With 5 people per show, iPlayer has all appearances listed. The host/captains/regulars have included Sue Perkins (Host × 25).
Total appearances:
Guest appearances i.e. ignoring the host/captains/regulars:
All people:
Guests i.e. ignoring the host/captains/regulars:
Last updated: 2016/02/07