(written from a Production point of view)
He is the husband of actress Megan Gallagher, who played Mareel in DS9: "Invasive Procedures", Nurse Faith Garland in the Star Trek: Deep Space Nine episode "Little Green Men" and Jaryn in "Body and Soul". He is also the brother-in-law of Catherine Hicks, who played Dr. Gillian Taylor in Star Trek IV: The Voyage Home. In addition, he illustrated Robert Picardo's book The Hologram's Handbook.
From 1995 to 1996, Yagher starred in the short-lived series Live Shot. Other Star Trek stars who were also cast members include David Birney, Ron Canada, Karen Austin, Bruce McGill and Sam Anderson. Star Trek stars who guest-starred include Casey Biggs, Chase Masterson, Dion Anderson, John Schuck, Lee Arenberg, Hal Landon, Jr., Cully Fredricksen and Kenneth Tigar.