Along with
Jeffrey Combs,
J.G. Hertzler and
Thomas Kopache, he is one of only four actors
to play seven different characters on "Star Trek". He played a scholar
in
Star Trek: The Next Generation (1987), Ah-Kel, Ro-Kel and Silarin Prin in
Star Trek: Deep Space Nine (1993), Kir in
Star Trek: Voyager (1995)
and Trena'L and Degra in
Star Trek: Enterprise (2001).