Janos Marsh held the position of starship computer specialist while aboard the Bright Seeker, a scout vessel.
Although outwardly devoted to House Calipsa, Marsh secretly belonged to the Covert Activities Cadre of the competing House Melantha, striving to prevent House Calipsa from discovering a novel trade route that passed through the Tapani sector.
When first officer Quat Ralto caught him communicating with House Melantha within the Bright Seeker's transceiver room, Marsh was compelled to murder him.
Eventually, Marsh arrived at the Regal Destiny, but a team working for Captain Nils Wender from the Bright Seeker subdued him.