The debut of "The 100" was the CW's most watched new series premiere of the season with 2.7 million viewers.

The sci-fi drama delivered the network's best total viewer numbers in its time period since September 8, 2010, according to preliminary Live Plus Same Day Nielsen ratings for Wednesday, March 19, 2014.

"The 100" built on its "Arrow" lead-in by 13 percent in total viewers, and by 13 percent in adults 18-49 (0.9/3). It held 88 percent of its lead-in in adults 18-34 (0.7/2).

"The 100" is the first show to build on its "Arrow" lead-in in the hour in total viewers and was the CW's most-watched midseason premiere in four years.

Compared to "Supernatural" in the year-ago time period, "The 100" was up 24 percent in total viewers.