Regular cast non-appearances
Instances of regular cast non-appearances in an episode:

 TOS regular cast non-appearances
 TAS regular cast non-appearances
 TNG regular cast non-appearances
 DS9 regular cast non-appearances
 VOY regular cast non-appearances
 ENT regular cast non-appearances
 DIS regular cast non-appearances
 PIC regular cast non-appearances
 LD regular cast non-appearances

cs:Nevystupující stálé postavy
fr:Non-apparition des personnages principaux