The CW is doubling down on vampires this summer by investing in a complementary series for the network's hit program Vampire Diaries. The new acquisition is Moonlight, which aired on (and was canceled by) CBS two years ago. Repeats of the series will debut on June 3 and air on Thursdays this summer. No word yet on whether the original cast will return -- Moonlight star Alex O'Loughlin is currently attached to the Hawaii Five-O remake on CBS. [Deadline]