Update 2: It turns out the initial overnight ratings were accurate after all.

While “The 100″ posted improved adults 18-49 and total viewership numbers in the Nielsen Fast Nationals, it suffered a downward adjustment in the final data. The adjustment brought the episode’s adults 18-49 rating back into congruity with last week’s 0.5.

The episode did, however, enjoy a slightly improved viewership count of 1.80 million.

Earlier in the night, an original edition of “Arrow” posted a 0.7 rating with 2.26 million viewers. While the lead-in support was preferable to that delivered by last week’s encore, it provided a series low level of support in the coveted adults 18-49 demographic.
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Update: While the overnights only confirmed week-to-week stability for The CW’s “The 100,” the adults 18-49 rating and total viewership numbers reveal a sizable gain.

Making a strong case for a season 2 renewal, The CW’s freshman rose to a 0.6 adults 18-49 rating with 2.02 million viewers. Both figures were up from those of last week’s episode, which clocked in at a 0.5 in adults 18-49 and 1.69 million in total viewers.

The return of lead-in support from an original “Arrow” certainly helped, but it did not provide a monstrous boost in the young adults demographic. Tying a season low, Wednesday’s edition of “Arrow” delivered a 0.7 in adults 18-49.

Viewership clocked in at 2.36 million.
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The return of The CW’s “Arrow” did not elevate new drama “The 100″ to significantly improved ratings Wednesday, at least as far as the overnight metered market numbers go, but it did help the show avoid another decline.

After declining in the overnights each week since its premiere, “The 100″ finally stabilized this week. It matched last week’s 1.4 overnight household rating. While not certain, one would assume the show’s adults 18-49 and total viewership numbers also held up.

Granted, the lead-in support did not hurt matters. After receiving a 1.1 overnight lead-in from last week’s “Arrow” encore, this week’s “The 100″ benefited from a 2.0 overnight household rating for a new installment of “Arrow.”

Evaluated in that scenario, this week’s “The 100″ actually performed worse than its last comparable telecast in the overnights. Airing out of an “Arrow” that posted a 1.9 overnight rating, the 4/2 edition of “The 100″ delivered a 1.5.

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