Theodore Bikel
Theodore Meir Bikel  was the actor who portrayed Sergey Rozhenko in the  fourth season episode . A versatile character actor, born in Vienna, Austria, Bikel was a master of languages, dialects, and accents, and often played ethnic roles, such as a German officer and Serbian king.

Outside of Star Trek, Bikel is probably best known for his -nominated performance as Sheriff Max Muller in the classic 1958 film, The Defiant Ones. This film also featured fellow Star Trek guest actors Whit Bissell and Lawrence Dobkin in the cast.

Bikel made appearances in a number of other classic, highly memorable films, including The African Queen (1951), the original Moulin Rouge (1952), The Enemy Below (1957, with Biff Elliot), My Fair Lady (1964), and The Russians Are Coming, the Russians Are Coming (1966, with Brian Keith, Andrea Dromm, Don Keefer, and Michael J. Pollard). In 1958, he starred in the acclaimed drama I Want to Live!, directed by Robert Wise (who would later direct ) and written by Don M. Mankiewicz. This film also featured Jon Lormer in an uncredited role as a doctor. 

Bikel made guest appearances on such television shows as The Twilight Zone, Dr. Kildare, Gunsmoke, Mission: Impossible, Charlie's Angels, Murder, She Wrote (playing a different role in each episode he was in), Fantasy Island (starring Ricardo Montalban), L.A. Law (with Corbin Bernsen and Larry Drake), and Law & Order, and had recurring roles on Dynasty (with Joan Collins) and Falcon Crest. He also had two roles on Babylon 5. In addition, he portrayed President Richard Nixon's Secretary of State  in the 1989 Watergate TV movie The Final Days. This movie also featured James B. Sikking, Gregg Henry, Richard Kiley, and David Ogden Stiers.

On stage, Bikel played the role of Captain von Trapp in the musical The Sound of Music. This role was played by Christopher Plummer in the 1965 film version.

Bikel passed away on 21 July 2015 at the age of 91.

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Performers
TNG performers