Leave it to Blast-Off Burlesque, one of our city's most beloved troupes, to take us back to a time when the dames were sassy and some liked it hot. The world premiere of Blast-Off's MYSTERIOUS MYSTERIES OF THE UNKNOWN launches 2009's SciFi-A-GoGo series Sat., JAN. 17, combining themes of the supernatural and surreal with a cheeky performance of burlesque and vaudeville. The two-hour spectacular will debut a short film, as well as titillate the audience with special guest performances from the likes of Syrens of the South, Vagina Jenkins, Calu and surprise appearances from a few paranormal superstars. $10. 10 p.m.; preview Jan. 16, 10 p.m. Alcove Gallery, 2852 E. College Ave., Decatur. 404-663-0159. www.scifi-a-gogo.com.