Arrow's slogan for this season is "Aim Higher" and this week saw it take a step in that direction, getting the show back into a full 1.0 rating in the core demographic. It's been fairly steady this season, bouncing up and down between about two-tenths of a point, averaging a .98 for the season.
That makes it second only to its little brother on The CW, The Flash, averaging just above a 1.4 for the season. Both series should see a bit of a jump with their next episodes, the annual crossover between the shows.
Supernatural held at a .7, identical from the previous week, and right at its season average. That keeps all three of those shows firmly in the "comfortable" to "great" status for The CW as they approach mid-season, sure to be renewed.