Elvis was reunited with his co-star Yvonne Craig the day before they began filming Kissin' Cousins in October 1963.
He invited her out to dinner, and she gladly accepted.
Afterwards, they decided to go to Elvis' house to watch some television.
Elvis fell asleep while watching an old movie and Yvonne decided to leave.
Not wanting to disturb her sleeping date, she covered Elvis with a blanket, turned off the tv and the light, and went out the door.
Just before locking the door Yvonne remembered that Elvis hated the dark.
She went back inside.
After turning on a light, Yvonne went to the front door and walked out, closing the door behind her.
As she turned to walk away, she saw five police cars in front of the house.
Policemen, guns in hand, were aiming their weapons at her.
Yvonne had activated a silent alarm.
The sergeant in charge questioned her about who she was and what she was doing there.
The policemen then rang the doorbell and woke Elvis up.
He verified Yvonne's story and they let her go.
Elvis laughed at her for getting into such a situation and called her a silly bird.
The following morning on the set, Elvis popped into her dressing room and asked her if she'd set off any more alarms.
Yvonne told him to shut up and get out; she was embarrassed enough and did not want to keep being reminded of the incident.
Although she was a little piqued at Elvis when the scene was finished they walked hand in hand back to his dressing room.