The past haunts us. The past defines us.

So teases the official trailer for this Friday's episode of Smallville, which will feature a pair of special appearances:

1. Lindsay Hartley as Mad Harriet.
2. Teri Hatcher as Ella Lane.

While viewers may still be digesting events from the November 5 installment - reviewed by TV Fanatic HERE - we encourage them to take a moment and look ahead. Below, we've posted the preview for "Abandoned."

[video url="http://www.tvfanatic.com/videos/exploring-the-past/" title="Exploring the Past"] [/video]

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