The third season introduced two new series regulars, both of whom were credited as starring in select episodes. Katie Cassidy portrayed the demon Ruby, who was created to change the perception of demons into more of a grey area, rather than the "black and white", "They're evil, we're good" approach previously used in the series.[1] Likewise, Lauren Cohan's character of Bela Talbot was meant to be "someone [the Winchesters have] really never come across before".