...if you asked, "who?", well, I didn't know his real name either.
I guess it must have been missed here - I had no idea he died until I was doing a re-watch of the 2004 BG series and looked up the show's Wiki page. I remember him as the doctor from that 2004 series. He also played Dutch Leitner in 'Soap' as well as several CBC series. Also Tron: Legacy, Butch Cassidy and the Sundance Kid, The Flash, Legends of Tomorrow, and too many others to recount here.
He passed away about a month ago, on January 8, due to cancer. He was 80 years old.
RIP. I loved his character in BG and I vaguely remember him from Soap, too.
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(https://images-na.ssl-images-amazon.com/images/M/MV5BNTQxMTkzODU5Nl5BMl5BanBnXkFtZTcwNzUwODYxOA@@._V1_SY500_CR0,0,733,500_AL_.jpg)
Rest in peace, Donnelly.
RIP
RIP
RIP
Loved him in Battlestar Galactica. R.I.P. Doc.