5) I disagree with #5. It's unprofessional to bring someone to set. Most talent who ask such either don't have agents or their agent has not groomed them as to what behavior on set is expected of them. You are there to work just as if you're at any other job. Even ASKING permission to bring someone looks unprofessional. If you feel unsafe, don't accept the scene.
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"What I do know is that if Karen Carpenter and Mama Cass Elliot had shared that sandwich they'd both be alive today." -Michael K