Happy 100th! After five seasons of shocking twists, sad deaths, epic romances and quippy one-liners,
The Vampire Diaries is hitting its milestone 100th episode. And in that 100th episode, we can reveal that Joseph Morgan makes an appearance as Klaus (and will share screen time with Caroline only) and Michael Trevino as Tyler, who was last seen in New Orleans on The Originals. The Vampire Diaries airs tonight at 8 p.m. on the CW.