Television networks have axed over 20 shows going into the fall season, many of which were only on the air for one season.

Some networks chose to slash only a few of its shows (CBS) while others are looking to retool their entire programming lineup (NBC).

ABC cancelled freshman comedy How to Live With Your Parents (For the Rest of Your Life) after only six episodes aired.  Malibu Country, starring Reba McEntire and Lily Tomlin, also got the boot after only one season.  Much to the dismay of its fans, cult favorite Happy Endings was cancelled after ABC tried moving the show around to different nights and timeslots, but it ultimately failed to generate enough viewers.

Other shows canceled by ABC include the Dana Delany vehicle Body of Proof and new shows Family Tools and Red Widow.

CBS took one of its two remaining CSI: programs off the air, cancelling CSI: NY.  New show Vegas was also cancelled despite its star power (Dennis Quaid, Michael Chiklis), as was midseason replacement Golden Boy.  David Spade comedy Rules of Engagement also failed to get picked up after seven seasons on the air. 

Fox only cancelled two shows going into the fall:  Supernatural drama Fringe ended after five seasons while Kiefer Sutherland drama Touch was cancelled after only two seasons.  The fate of The Cleveland Show is still up in the air since the show failed to appear on Fox's fall schedule.

NBC took a sledgehammer to much of its spring programming, cancelling eight shows, in addition to the final seasons of 30 Rock and The Office.  Freshman comedies 1600 Penn, Go On, Guys with Kids and The New Normal were all cancelled.  Two-season comedies Up All Night and Whitney were also removed from the air.  Broadway drama Smash was cancelled due to low ratings, as was political drama Deception.  Not on the schedule for the 2013-2014 season are The Celebrity Apprentice and Hannibal, though neither has been officially cancelled.

The CW is ending three of its shows: freshman drama Cult, five-season reboot 90210 and Gossip Girl, which ran for six seasons.

For a full list of cancelled and renewed shows, click here.