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CW is cancelling four of its series -- two dramas and two comedies, says Variety.

One of the biggest shows to get the ax is 'Privileged,' which aired on Tuesdays after the popular '90210' reboot. 'Privileged' remained on the 2009 bubble in true roller-coaster fashion, with earlier rumors of a midseason pick-up. There were even reports that the network would re-air the show's first season in the summer.

However, today's cancellation ends all talk -- a decision that series creator Rina Mimoun called "truly heartbreaking," according to the Ausiello Files.

Also getting the boot from the CW is 'Reaper.' 'Reaper' was in a similar position last year as one of the network's bubbled shows, but still managed a 13-episode pick-up for midseason. Unfortunately, the same cannot be said for next season's lineup.

'Wife Swap' and 'Supernanny'
(8PM & 9PM, ABC) 5th season finales
In this corner: It's the Schults family, whose members love Halloween so much that they cover their walls with fake blood and operate a creepy haunted house.

And in the other 'Wife Swap' corner: The Smith fam, led by 63-year-old dad Allen and 54-year-old mom Christine, two no-nonsense parents who don't allow their teens to watch TV or surf the Internet ... so you can imagine the friction that ensues when the families' moms swap households for a week.

Meanwhile, 'Supernanny' Jo is tackling some sticky family issues of her own, as she ties to calm down four violent, fighting siblings and the church employee dad who's all about spanking vs. timeouts.

'Friday Night Lights'
(9PM, NBC)
Several dramas that have been brewing for weeks explode in yet another smartly written, superbly acted episode of 'FNL': An accident with his grandma forces Matt to admit he needs his mom's help in caring for his granny, while Riggins is uncharacteristically unselfish in order to help Lyla snap out of her self-destructive funk and Tyra gets some much-needed confidence boosting from her mom.

But it's beleaguered J.D. McCoy whose situation takes a turn for the worse.

The QB's dad has belittled his beaten down son all season, and when the teen finally stands up to the old man, the senior McCoy crosses the line from screaming creep to physical abuser.

Beverly Hills, 90210 ... 21 Jump Street ... The Facts of Life ... see where they rank on our list.

The bad news? Summer's almost over and it's nearly time for school again.

The good news? We've got just the thing to ease you into back-to-school mode: Our countdown of TV's 21 best school shows ever.

So sharpen your No. 2 pencil and dive in to see which series just make the grade and which ones are at the top of the class.