The First Doctor and Walter Bishop from Fringe have a connection. A quite interesting connection at that. It's not that both are older actors in main roles, it's better than that.
Every time I watch Fringe and hear Walter call Astrid by some name other than Astrid I think back to the First Doctor, William Hartnell. That Doctor's habit was to constantly call Ian Chesterton by the wrong name.
It was usually something like Chesserman, Chatterton, Chesterfield, Chesterman...
Originally this came about with Hartnell having trouble remembering all the dialogue and occasionally spouting out the wrong name. They turned this into a running gag and the First Doctor would almost always get Ian's name wrong.
Of course, this type of joke has been taken to an extreme on Fringe with Walter's inability to remember Astrid's name with errors like Asterisk, Astro, Asteroid, Astringent, Asprin, Ashram, Ostrich, Claire, Athos, Alex, Afro, Agnes.
Funny thing is, Walter doesn't seem to have a problem with name of anybody else.
You wonder if this homage to Doctor Who was on purpose or not?