Quick note re: the casting of Alex Kingston on Arrow—they’ve also cast Colin Salmon, who played Dr. Moon in Silence in the Library/Forest of the Dead, as Oliver’s stepfather, Walter. Fans for sure!
Wasn’t Malcom Merlyn played by John Barrowman, aka Capt. Jack Harkness?
And John Barrowman. If Arrow gets to have many seasons, the whole cast of Doctor Who could end up on it!
I also just remembered, on the note of Arrow being a fun little Doctor Who reunion, Ben Browder (Farscape, SG1) who was...
Not to mention Captain Jack as Merlyn.