John Barrowman

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'Captain Jack Harkness' in Doctor Who and Torchwood
'Patrick Logan' in Desperate Housewives
'Malcolm Merlyn' in Arrow and The Flash  and Legends of Tomorrow
'Jeremy' in Zero Dark Thirty

Ah, the colour cast of Earl's Court. Correcting it seems to make his t-shirt wrong so this is the best I can get. The funny face he's pulling in the last picture is in response to my question ('What's your favourite scene you've been in, in Dr Who?). His initial reply was that anything with guns, explosions and big boys toys, but after I said that mine was the Trinny & Susannah-bot scene he laughed and said that really his was too but he didn't want to come across as vain...

(In case there's anyone reading this who doesn't know, the Trinny&Susannah-bot scene...well, he wasn't entirely dressed for all of it).