Real World article
(written from a Production point of view)

Instances on Star Trek: Enterprise of a main character listed in the opening credits not appearing in the episode.

Since "In a Mirror, Darkly" and "In a Mirror, Darkly, Part II" are set in the mirror universe with no character crossovers, none of the actual main characters appeared, except for a hallucination of Jonathan Archer and photos of Archer and Hoshi Sato in their bios. Technically, "These Are the Voyages..." had none of the main characters, since they were only 24th century holographic duplicates.

Scott Bakula

Jolene Blalock

Connor Trinneer

Dominic Keating

Anthony Montgomery

Linda Park

John Billingsley

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