It's Farscape, and TheirLoveIsSoEpic. John Crichton and Aeryn Sun (played by Ben Browder and Claudia Black). On youtube if you search for' John/Aeryn moments' there's a list of the best moments (http://www.youtube.com/results?search_query=john%2Faeryn+moments&search_type=&aq=f) of the two of them. The first few are VERY spoilery for the last moments of the show, however, but this one I think captures a lot about their relationship without spoiling anything at all.



((Oversimplified explanation of what's going on--the little bottle is a 'kiss test,' used to determine whether two individuals are close enough in genetics to procreate (BIIIG universe, lotsa races, Farscape). Edit: if the kiss is bitter, they can't, if it's sweet, they can. Sorry for inbox spam!))