Caught a replay of the "Women of Sci-Fi Calender documentary" from a few years back, which was..quirkily interesting
Michael Shanks (aka Daniel Jackson of Stargate SG1 fame) apparently came up with the idea, and Christopher Judge (Teal'c of SG1) is a photographer in his spare time.
The whole assortment of Sci-Fi shows filmed in Vancouver being really quite familial, they got a bunch of their friends and relatives to turn up and be the stars of a Sci-Fi calendar.
Kind of amusing the behind the scenes and seeing them chatting and acting as their real selves rather then the assortment of characters they're so known for by the fans.
But yes, the likes of Erica Durance (known more for Smallville, but also guest starred on SG-1 and other sci-fi) happens to be married to Judge's brother. Shanks is married to Lexa Doig (of Andromeda fame), and then they pulled in friends from the various shows they all work in .. So Teryl Rothery, Ona Grauer, Laura Bertram, Rachel Luttrell, Brandy Ledford...
Some interesting background chat, and just how interrelated it all gets. Also having these actresses who were all "wow, modelling pinup style for the cameras is a lot of hard work in its way"