The Ghost Whisperer concludes its fourth season with a major event this Friday:

Melinda gives birth!

While he wouldn't reveal much else about the episode, or the development, Michael Ausiello of Entertainment Weekly did say the baby arrives within the opening minutes of "Book of Changes." But, wait!

The television columnist also says "there's a twist." Guess it wouldn't be much of a finale if there wasn't one, huh?

Matt Richenthal is the Editor in Chief of TV Fanatic. Follow him on Twitter and on Google+.