Marcellus
Referenced in the final revised draft script of the  first season episode , Marcellus is a character in William Shakespeare's  Hamlet.

Marcellus was mentioned once in the final revised draft of the script for  (dated ). The script referred to Marcellus as being portrayed by a member of the Karidian Company of Players during a performance of Hamlet aboard the , in the starship's theater. The actor playing Marcellus walked offstage, with Horatio, just as Captain James T. Kirk entered the backstage area.

"Marcellus" was also originally to have been the name of the character ultimately called , in .
Unused production material