The “Supernatural” cast and crew have been busy shooting the season’s fourth episode, “A Weekend at Bobby’s.” Series star Jensen Ackles is taking his first big step behind the camera as director, and so far, he’s getting rave reviews.

“Had lunch my buddy who just shot SPN episode. NOT saying anthying other than this: 1) Jensen was a great director…2) Blood everywhere!” tweeted Samantha Ferris, who played Ellen Harvelle until she was killed off last season.

The shoot hasn’t been all bloody fun and games, though. Zap2it fave Jim Beaver worked a 17-hour day as Bobby Singer (hear that, Katherine Heigl?) and the following day updated his Facebook status to read:

“The heatwave hit Vancouver today, and between being sunbaked and allergy-stricken, I’d just as soon have skipped today.” Sounds brutal — but we’d endure it to spend the day getting bossed around by Jensen Ackles. Just sayin’.

Expect some serious violence in the episode. “Haven’t had a major all-out fight scene in years,” says Beaver. “Halfway through this one and I’m feeling pain in places I didn’t know I had places. Fun!” Shooting a fight scene during a heat wave under TV lights doesn’t exactly sound fun. “Home at 1 a.m., we’ll finish the fight tomorrow,” he writes. “When you pull off your shirt and it drips onto the floor, you know it’s been a warm day.”

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