TVGuide.com, a one-stop entertainment and video destination reaching more than 19 million unique users per month, today announced its list of the eight must-watch shows debuting on network television this fall. The 2009 fall television season officially gets under way Tuesday, September 8.

TVGuide.com’s editorial team selected eight shows that stand out as the most fun, the highest quality and the most buzz-worthy out of the 21 new shows premiering on the five major networks this fall. The eight shows are (listed in alphabetical order): Community (NBC), Cougar Town (ABC), FlashForward (ABC), Glee (FOX), Melrose Place (CW), Modern Family (ABC), NCIS: Los Angeles (CBS), and The Vampire Diaries (CW).

A complete schedule of new and returning television premiere dates, online video previews and streaming episodes, and show recaps and synopses are available in the Fall Preview section of TVGuide.com. In addition, TV Guide Network will premiere its two-hour “2009 Fall TV Preview” special on Sunday, September 13 at 8:00 p.m. ET/PT.

TVGuide.com Senior Editor Mickey O’Connor had the following comments for each show, listed by network:

Cougar Town (September 23) – “Cougars everywhere rejoice! Courteney Cox shines in her funniest role since Friends.”