People who habve played similar Guest Stars on multiple shows

Note I did not say type cast, this is a far broader category. It dose not have to be a character who is exactly similar to the earlier one, but they should be in a similar position.

My nomination Leslie Hope has played tragic and doomed maternal figures on Deep Space Nine, House and even 24.

Richard Belzer, natch.

Brad Dourif appeared as a serial killer on the X-Files, Babylon 5, and Voyager.