Here are The CW’s renew/cancel standings for week 17 of the 2017-18 season.
|Show||Status||18-49 rating||Renew/Cancel Index|
|Crazy Ex-Girlfriend||🐻 🐻 🐻 🐻||0.2||0.0|
|Jane the Virgin||🐻 🐻 🐻 🐻||0.26||0.06|
|Dynasty||🐻 🐻 🐻 🐻||0.22||0.02|
|Arrow||🐻 🐻 🐻 🐻||0.52||0.32|
|Supernatural||🐻 🐻 🐻 🐻||0.6||0.4|
|Riverdale||🐻 🐻 🐻 🐻 🐻||0.56||0.36|
|Supergirl||🐻 🐻 🐻 🐻 🐻||0.55||0.35|
|Legends of Tomorrow||🐻 🐻 🐻 🐻 🐻||0.56||0.36|
|Black Lightning||🐻 🐻 🐻 🐻 🐻||0.80||0.60|
|The Flash||🐻 🐻 🐻 🐻 🐻||0.90||0.70|
Given The CW’s bias toward renewing most of its shows, “Black Lightning” was always going to open as a likely renewal, barring an outright disaster for its premiere in the ratings.
“Black Lightning’s” premiere was the opposite of a disaster, though. It was the best series debut for the network in two years, and thus it begins life on the Renew/Cancel Index as a sure thing for 2018-19.
Note: All of The CW’s shows are produced by network owners CBS and Warner Bros., so the (O) designation (see below) is immaterial.
|DSW||Dead Show Walking: All but officially canceled yet still airing|
|🐻||sure bet to be canceled by May 2018|
|🐻 🐻||likely to be canceled by May 2018|
|🐻 🐻 🐻||tossup between renewal and cancellation by May 2018|
|🐻 🐻 🐻 🐻||likely to be renewed by May 2018|
|🐻 🐻 🐻 🐻 🐻||sure bet to be renewed by May 2018|
The Renew/Cancel Index is the amount above (or below) a replacement-level rating — i.e., the expected adults 18-49 rating of an emergency fill-in show should a series be canceled. For the 2016-17 season, replacement level is a 0.7 same-day rating in adults 18-49 for the Big 4 networks and a 0.2 for The CW. (Read more here.) The index number is taken by subtracting 0.7 (or 0.2) from a show’s average same-day rating.
Friday scripted shows (denoted with an “F” above) on the Big 4 have average ratings about 30 percent lower than those of other nights, therefore their ratings are multiplied by 1.43 (1/0.7, or 70 percent) before subtracting the replacement-level number. There is little variance for The CW on Friday, so the multiplier is not used.
Shows that have ended their seasons have their R/C Index number frozen at the point of their final episode.
(O) – Owned: All other things equal, shows owned by studios affiliated with their networks have a better shot at renewal than those from outside producers.