(written from a Production point of view)
John Rosenfeld is the actor who played an alien technician in the Star Trek: Voyager seventh season episode "Friendship One" and later Mark Latrelle in the Star Trek: Enterprise first season episode "Silent Enemy".
Rosenfeld made about three dozen television guest appearances. These include episodes of series such as ER (with Cress Williams, Vaughn Armstrong, Jimmie F. Skaggs, and Lily Mariye), Buffy the Vampire Slayer (with Harry Groener and Armin Shimerman), CSI: Crime Scene Investigation (starring Paul Guilfoyle), NCIS (with Jeff Austin, Alan Dale, and Terry O'Quinn), Charmed (directed by LeVar Burton), It's Always Sunny in Philadelphia, How I Met Your Mother, Desperate Housewives (starring Teri Hatcher and Brenda Strong, with Ellen Geer and J. Michael Flynn, directed by Larry Shaw), Monk (with Stanley Kamel), Prison Break (starring Wade Andrew Williams, Robert Knepper, Cress Williams, and Leon Russom, with Derek Anthony and Reggie Lee), 24 (with Annie Wersching, Jeffrey Nordling, Bob Gunton, Kurtwood Smith, John Billingsley, and Tony Todd), and Law & Order: LA (with Tamlyn Tomita Colby French, Daphne Ashbrook, Dennis Cockrum, and James W. Jansen).