And yes, it turns out they were filmed in the MCAS Tustin blimp hangars.

The Fifth Color | Reach for the Stars
It was four o’clock in the morning. We had to leave my place in Santa Barbara at 2 a.m. to arrive on time to get into costuming and make-up at a blimp hanger in Tustin, CA. Corporate Headquarters called me in.

And by Corporate Headquarters, I mean Starfleet.

And yes, it turns out they were filmed in the MCAS Tustin blimp hangars.

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