Credit: Sergei Bachlakov/The CW

The CW’s bubble shows One Tree Hill and Hellcats returned Tuesday night after more than a month off the air. The ultra-veteran consummate survivor One Tree matched its last episode (1.4 million viewers, 1.1 preliminary adults 18-49 rating), but newbie Hellcats (1.1 million, 0.5) — a show that the network was intending to pick up — sunk 17 percent to a problematic series low.

Across broadcast, networks were probably impacted by the Knicks vs. Celtics NBA playoffs on cable.

Fox led the night with Glee (9.7 million, 3.7) dropping 12 percent and Raising Hope (5.7 million, 3.2) slipping 4 percent, but struggling freshman comedy Traffic Light (3.2 million, 1.4) perked up, thanks to having an original lead-in this week.

NBC had The Biggest Loser (6.5 million, 2.3), down 15 percent, followed by the season finale of Parenthood (6.3 million, 2.5), which raised 19 percent and won its hour — you can consider Parenthood a lock for a renewal.

CBS had repeats. ABC’s Jamie Oliver’s Food Revolution (4.7 million, 1.1) is crashing in the red zone, falling 27 percent. Dancing With the Stars results show (15.8 million, 2.9) won its hour while slipping 6 percent. Body of Proof (11.5 million, 2.4) slipped 4 percent from last week, but this is good number for an ABC drama at 10 p.m. nowadays.

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