The CW has picked up a new TV series, “Hellcats,” based on Kate Torgovnick’s CHEER!: Inside the Secret World of College Cheerleaders (Touchstone). The drama stars Alyson Michalka and Ashley Tisdale and will air on Wednesdays this fall after “America’s Next Top Model.” Actor Tom Welling (“Smallville”) and writer Kevin Murphy have teamed to executive produce.