Parah means cow, and the section describes the red heifer that was killed as part of an ancient purification ritual . We are reminded to purify our homes - and ourselves - with the festival fast approaching. See this explanation of this week's haftarah.
This is truly the weekend of the cow, because our regular portion this week is Ki Tissa, which contains the Golden Calf account. See G-dcast's animated summary below.
Parshat Ki Tisa from G-dcast.com
More Torah cartoons at http://www.g-dcast.com/