The axe falls: 17 TV shows you won't be seeing anymore

Okay, hardcore TV fans, brace yourselves. Here's the list of underperforming TV shows that have been cancelled:

"Alcatraz" (Fox)

"Awake" (NBC)

"Are You There, Chelsey?" (NBC)

"Bent" (NBC)

"Best Friends Forever" (NBC)

"Breaking In" (Fox)

"The Finder" (Fox)

"The Firm" (NBC)

"GCB" (ABC)

"A Gifted Man" (CBS)

"Harry's Law" (NBC)

"I Hate My Teenage Daughter" (Fox)

"Missing" (ABC)

"Pan Am" (ABC)

"Ringer" (The CW)

"The River" (ABC)

"The Secret Circe" (The CW)

So here's what I'd like to know: How much money does a network need to make to justify keeping a series, and does this mean we're one step closer to all reality TV, all the time?