(written from a Production point of view)
David Anthony Marshall is the actor who portrayed Magnus Hansen in the Star Trek: Voyager fourth season episodes "Scorpion, Part II" and "The Raven", before being replaced by Kirk Baily in later episodes.
For "Scorpion, Part II", Marshall filmed his scenes on second unit on Thursday 17 July 1997 on location at the grassy area in front of the Paramount Administration Building and is listed as "Father" on the call sheet. He filmed his scenes along with Nikki Tyler and Erica Bryan and stand-ins Keith Rayve, Cameron, and June Jordan. Marshall is also listed as "Father" on the call sheet for the episode "The Raven" for which he filmed his scene on Monday 28 July 1997 on Paramount Stage 16.
He also appeared in the action film Another 48 Hours (1990, with Kevin Tighe, Ed O'Ross, Bernie Casey, Page Leong, Allan Graf, Biff Yeager, Rex Pierson, Benjamin Lum, Victor Brandt and Shauna O'Brien, music by James Horner, and stunts by Patricia Tallman).