Oliver Hirschbiegel is a/an Television director. Television director has example: Sam Shepard
[Human]: Do you have any recommended directors similar to Oliver Hirschniegel? [Assistant]: Yes, Oliver is a Television  and film director. Other similar directors are Sam Shepard and Robert Butler, and Tim Fywell. [Human]: Interesting. What has Robert Butler directed? [Assistant]: I don't have any information on what Robert directed, but I can tell you more about Sam Shepard if you'd like? [Human]: Sure, go ahead. 
Robert Butler directed the TV series Friends and The Office. He also wrote and directed the movie The Godfather.