Billy Andersen
Billy Andersen was a miner on Janus VI mentioned by Ed Appel in a deleted line of dialog found in the  revision of the script for the  first season episode .

Appel mentioned "I only got away by the skin of my teeth. Poor Billy Andersen... the man who was with me... he never had a chance," when describing the time he shot the Mother Horta, while noting the ineffectiveness of a phaser against the "monster". 

Reference to Andersen, however spelled as 'Anderson', also appeared in James Blish's adaptation of the episode found in Star Trek 4.

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