'Dallas' Star Arrested for Trying to Board Airplane with Gun

10/25/2012 6:50 PM PDT

Actor Jack Scalia -- who starred on "Dallas" back in the 80s -- was arrested at LAX this afternoon for trying to bring a gun onto an airplane, TMZ has learned.

LAX police tell TMZ, Scalia was popped at the security checkpoint at Terminal 7 when TSA agents discovered he had a 9mm Glock in his carry-on bag. The gun was NOT loaded.

Upon searching him, LAX police tell us, TSA agents also discovered a novelty police badge in his pocket. 

Scalia is still in custody.