90210's Third Season proved success enough for the CW to commission a Fourth Season, however the Third Season proved tremendously inconsistent. For every truly great episode such as Liars, which acted as the perfect mid-season finale, there was a moment where Naomi for reasons best known to herself took medication with alcohol...for no good reason! The Fourth Season proved just as, if not more, inconsistent than its predecessor. Several potentially succsessful characters such as Austin were introduced but chronically underused or misdeployed in bad storylines. Annie's entire storyline was nonsensical, as the small town girl from Kansas violently swung from acting as an escort to fund her tuition to attempting to seduce a priest. The only mercy that was Ivy, whose character has been rather dull and a poor fit for the series is finally bowing out. Frankly, since it came down to a choice between her and Teddy, it seems foolish that Teddy wasn't kept on as a main character. Even more bizarrly, he appears sporadically throughout the first 11 episodes, only to return at the end of the season to become Silver's baby daddy. The entire season is inconsistent and plagued by continuity issues - something 90210 has always struggled with. There are few thrills, and even Annalyne McCord's formidable efforts aren't enough to salvage this train wreck from near catastrophe. With this as a starting point, it seems unlikely 90210 will make it past the Fifth Season: assuming the CW can find a suitable replacement. Otherwise it'll quietly be retired in a 10 or 13 episode run to be replaced midseason.