Tonight's episode is Prehistoric Pensylvannia, which is the fifth episode of the first season. (if you miss it tonight, most weeks have it repeated the following afternoon)

The site says I got the second and third episodes around the wrong way, but I'm pretty sure that the "horror" episode was third, not second. But going by their site, we've still had a messed up order...

20/1 - S1 ep2 (Rise From Ashland) (with Transformers)
27/1 - S1 ep7 (It's Chiller Time)
03/2 - S1 ep1 (Jersey Shore)
10/2 - S1 ep6 (Mississippi Menace) (with Transformers)
17/2 - S1 ep5 (Prehistoric Pensylvannia)

The Jump in Website still has the first four episodes up, but the first one (with Bumblejumper, Lucky Draw Rodimus, and BotCon Pete's collection) comes down later today.