William Sylvester (January 31 1922 - January 25 1995) was an American TV and film actor. Among his film credits was Dr. Heywood Floyd in Stanley Kubrick's "2001 A Space Odyssey." He can also be seen in a brief cameo as a German Luftwaffe officer at the beginning of "The Hindenburg" (1975). Wikipedia
The definitive Wikipedia entry for William Sylvester. Wikipedia is the biggest multilingual free-content encyclopedia on the Internet. en.wikipedia.org/wiki/William_Sylvester