Az Odaát 3. evadja miert csak 13 részes?

Igazából 16 részes.

Amúgy valóban a sztrájkolás miatt:

"In the United States the season aired on Thursdays at 9:00 pm ET on The CW television network.[1] The CW ordered 22 episodes for the season, but interference from the 2007–08 Writers Guild of America strike ultimately limited the season to 16 episodes. Some storylines were thus postponed, which Kripke felt ultimately benefited the season by forcing the writers to focus on saving Dean. Despite its low ratings—it averaged only about 2.74 million American viewers—the series received an early renewal for a fourth season. The third season received mixed reviews from critics and fans, while the introduction of Ruby and Bela garnered generally negative responses."