I know this isn’t going to happen, for various reasons, but I can’t help speculating anyway.

Cast:

Regular:

John Barrowman
Gareth David-Lloyd
(breaking in open doors, I know)

Wish list (any of these):

Jamie Bamber
Jonathan Bennett
William Moseley
Aidan Turner
Milo Ventimiglia
Sendhil Ramamurthy
Noah Gray-Cabey
Georgie Henley
Jane Horrocks