Hollywood is reopening some old Doors.

For decades, the iconic L.A. band has steadfastly refused to let its songs appear in ads, leading many showbizzers to assume the catalog was off-limits for film and TV as well, or at least difficult to license.

But this season, Doors songs have broke on through, popping up in TV’s “Alias,” “Entourage,” “Sons & Daughters” and about 10 other shows; the upcoming Sony film “Perfect Stranger” will feature a Doors tune as well.

“The idea that the Doors would not allow their music in film or TV was a misunderstanding,” says Doors manager Jeff Jampol. “Our position was that we would never do a commercial for a mundane product and never endorse a product. If you’re talking cutting-edge technology that helps bring entertainment to the masses, we’ll consider it.”

Jampol credits some of the recent licensing activity to a boxed set titled “Love-Death-Travel,” which was sent to film and TV music supervisors last year.

The compilation, limited to 5,000 editions and bound in faux leather, contained Doors recordings, a signed lithograph of Jim Morrison and a list of 14 pre-authorized remixers who could deliver a revamped version of a Doors tune within three weeks.

But don’t expect a commercial anytime soon.

In the late 1960s, Morrison, upon hearing that his bandmates approved use of “Light My Fire” for a Buick Opel commercial, famously told them he would smash a Buick onstage at every Doors concert if the song appeared in the ad.

The deal died, and the band has since turned down a $15 million offer from Cadillac for “Break on Through” and a $4 million bid by Apple for another tune.