Great news! SYFY is dedicating the month of April to airing every episode of popular sci-fi/fantasy TV shows Battlestar Galactica and Xena: Warrior Princess. Not only will each show be marathoned in its entirety, but there will be special appearances from respective series stars Tricia Helfer and Lucy Lawless as well as other fun events. While both Battlestar Galactica and Xena are currently available to stream via the SYFY site as well as the NBCU OneApp, SYFY give both shows the major marathons they deserve. So, as noted in a press release, this big event kicks off with …