Actor who portrayed cunning KAOS agent Siegfried in 14 episodes of the 1960s TV show Get Smart, the 1989 reunion movie Get Smart, Again! and one episode of the 1995 revival series. In the reunion movie he also essays the role of Siegfried's twin brother Professor Helmut Schmelding.

In 2008 Bernie Kopell made a cameo appearance in the Get Smart reboot movie as a German-accented motorist driving the same model car seen in the season five opening credits.