maybe = maybe someday; drop = dropped after pilot
Dropped series, (more than 2-3 episode after):
Alphas, Almost Human, Silicon Valley, The Leftovers...

2018-19:
ABC:The Rookie, A Million Little Things (maybe), Whiskey Cavalier
CBS: Magnum P.I. (maybe), God Friended Me
CW: Charmed, Roswell (maybe)
NBC: Abby’s
FOX: The Passage

2017-18:
CW: Dynasty (maybe)
CBS: Young Sheldon (maybe)
ABC: Deception (maybe), Marvel’s Inhumans (maybe)
FOX: The Orville
NBC: Reverie (maybe), Good Girls (maybe)

2016-17:
CW: No Tomorrow, Frequency
CBS: MacGyver
ABC: Time After Time (drop), Still Star-Crossed (drop)
FOX: Lethal Weapon, Making History (maybe)
NBC: Timeless, Midnight Texas

2014-15:
NBC: Constantine, Mission Control (drop), A to Z, Aquarius (maybe), Heroes: Reborn
The CW: The Flash, iZombie, The Messengers (drop)
CBS: Stalker (drop), The Odd Couple (drop), CSI: Cyber (drop)
ABC: Forever, Selfie, Manhattan Love Story, Agent Carter (drop), The Whispers (drop)
FOX: Red Band Society, Gotham, Gracepoint (drop), Weird Loners (drop), The Last Man on Earth (drop)

2013-14:
ABC: S.H.I.E.L.D., The Resurrection (drop), Once Upon a Time in Wonderland
CBS: Intelligence (drop)
NBS: Believe, Crossbones (drop), Dracula (maybe), The Blacklist, The Family Guide (drop)
FOX: Wayward Pines (drop), Sleepy Hallow, Almost Human (drop)
The CW: The Tomorrow People, Reing (maybe), Star-Crossed, The 100

2012-13:
FOX: The Mindy Project (drop)
CBS: Elementary (drop)
ABC: Red Widow, 666 Park Avenue
NBC: Hannibal (maybe), Revolution
CW: Arrow, Beauty and The Beast (drop), The Carrie Diaries (drop)

2011-12:
NBC: Grimm
FOX: Terra Nova, New Girl (maybe)
ABC: Charlie’s Angels, Once Upon a Time, Pan Am (drop), Revenge (drop)
CBS: Two Broke Girls (drop), Person of Interest (drop), Unforgettable
CW: Ringer (maybe), Hart of Dixie (maybe), Secret Circle

2010-11:
CW: Nikita
CBS: Hawaii Five-O (maybe)
ABC: Detroit 1-8-7, Better Together (drop), No Ordinary Family (drop)
FOX: Raising Hope (drop)
NBC: Friends With Benefits (drop), Love Bites