For those fans not on Twitter, I collated most of the questions and Tom's responses. If I missed any let me know.
Tom Riley @thisisTomRiley Ok. I'm here. Lets Q&A this. Tag 'em #askriley & I'll get through as many as I can. Pre-emptive strike answer. I don't know about series 3. #askriley
@StressfulG What did you have for lunch today?
@thisisTomRiley Ha! I had Haddock.
@christineLappin #askriley Shepherd & monroe have great chemistry onscreen. Are you & James Nesbit good pals off screen? #missmonroemondays
@thisisTomRiley I love him. He's a fantastic friend and a brilliant actor.
@aquamarine_jo Congratulations on Monroe – damn good job. Now. Tell us something surprising about yourself! #askriley
@thisisTomRiley I used to be able to run the 100m at almost world record speed.
@meatkinson If you weren't an actor would you see a career in anaesthetics as an alternative? #askriley am an ICU nurse
@thisisTomRiley I think I might end up killing too many people.
@Lodgey22 what are james and sarah like towork with #askriley
@thisisTomRiley They're both fantastic. Fun as well as talented.
@lizzietaylor1 you're not leaving are you?! would you go back for a 3rd series? yours and monroes bromance is the best! #askriley
@thisisTomRiley Doesn't look that promising for Shepherd. He's left some devastation in his wake.
@jenyl6do you have a bucketlist or a list things or places that you always wanted to see/do? #askriley
@thisisTomRiley I've been lucky enough to tick most of them off. Adding more everyday.
@KarlieCol I know you're about to be all super famous (as you should be) but can we expect you back on broadway eventually? #askriley
@thisisTomRiley I may or may not be cooking up a plan with a friend...
@mandi3059 Did you at any time on set have the fit of giggles especially with James Nesbitt #askriley
@thisisTomRiley To be honest, it was @DrSarahParish that was the biggest cause of my giggles.
@laheard100 Is there a role or roles you've always wanted to play, but haven't yet? #askriley
@hernameisnicki who would win in a fight between Shepard & Springer? #askriley
@thisisTomRiley @LukeAllenGale has the upper body strength, but Shepherd has the sneaky moves.
@BeverleyBeck76 What's the best thing about working on Da Vinci's Demons? Apart from the fabulous SAs, of course! #askriley
@thisisTomRiley The scripts and the cast.
@derekbair #askriley What were you most surprised to learn about Leo? Why do you think he wrote mirrored?
@thisisTomRiley Speed. To write with both hands was the only way he could get everything in his mind out at once.
@mandi3059 What research did you do for your part as Shepherd? #askriley
@thisisTomRiley Studied anaesthesia and visited brain damaged patients in hospital as well as witnessed operations. I also shopped only in Next.
@ritch_diaz Does Da Vinci's Deamons has a premiere date? maybe after spartacus finale? #askriley
@thisisTomRiley It does. Any more than that and Starz would take me out the back of Florence and shoot me.
@hongkongfan So, where do you prefer working? UK or US? and whats your favourite work to date? #askriley
@thisisTomRiley Love working in both. UK is where my heart is. My proudest achievement was Arcadia on Broadway.
@iainco do you have an active interest in anaesthesia/neurosurgery?
@thisisTomRiley The show made me incredibly interested, yes. It's endlessly fascinating.
@derekbair#askriley (By mirrored I meant from right to left - backwards!) So that you can only read it by looking in a mirror! ;-)
@thisisTomRiley I know. But writing that way enabled him to write in two directions at once, so his hands didn't crash into one another.
@MissLauren_89 if you weren't an actor what would of you wanted to be instead? #askriley
@thisisTomRiley A chef or a record company A&R man.
@KarlieCol If you could play any other role in Arcadia, who would you choose? Or would you tackle Septimus again? #askriley
@thisisTomRiley I should play Bernard. It would be thematically consistent with the cycle Billy started and the play itself.
@sallyh32 your worst bad habit? #askriley
@thisisTomRiley Over thinking.
@stiffysteffy What are your plans for Christmas & new year #askriley drinking Zinfandel btw :)
@thisisTomRiley Family, Friends and New York. @emmajayneball have you got any pets?? #askriley #random
@ZoeB08 what's it like working with the genius that is James Nesbitt?? #askriley
@thisisTomRiley Exhausting. Too much genius can wear us lowly brains out.
@laheard100 Do you still have 'issues' watching yourself on the big screen? If so, is it any better watching yourself on TV? #askriley
@thisisTomRiley I've stopped watching. It makes it easier.
@mimiXmoo who are you closest to off set? (Monroe cast) #askriley
@thisisTomRiley Too hard to pick. They're awesome. Except for @TheAndrewGower, who is a terribly violent boy.
@paulenemarie would you be tempted to strut your stuff on Strictly? #askriley
@thisisTomRiley No. A thousand times no. My arse looks terrible in lycra. Take it from me.
@pudbayf who in the world of acting has inspired you the most? #askriley
@thisisTomRiley A publicist at ITV. She's got dimples.
@PicCeriMariePer #askriley What's you current favourite band/group?
@thisisTomRiley Last few albums I bought were Tame Impala, The Lumineers, Bat for Lashes and Dark Dark Dark.
@laheard100 There's + swords,horse riding n DVDemons. is that something you've enjoyed?would you consider an action movie? #askriley
@thisisTomRiley I need to heal the bruises from this one first.
@Shortandgrumpy Any dating tips from Shepherd to Springer @LukeAllenGale #askriley
@thisisTomRiley @LukeAllenGale Use less hair product.
@BlissMeliss Have you all come away from Monroe with major poker/gambling habits/skills? #askriley
@thisisTomRiley I lost my house to Jimmy.
@PicCeriMariePer #askriley What do you enjoy more reading a book or writing? I'm currently writing a novel about a girl with aspergers x
@thisisTomRiley I love both equally.
@StephenCotteri2 love the show! Did you enjoy filming in Leeds? #askriley
@thisisTomRiley I did. Although it was freezing.
@Amy_Brownaux what its like working with James Nesbitt and @DrSarahParish? #askriley
@thisisTomRiley Like working with your embarrassing, but sexy parents.
@laheard100 I heard you studied piano? Is music something you may consider or would like to develop professionally? #askriley
@thisisTomRiley A LONG time ago. It's a regret that I never continued.
@emmajayneball have you got any pets?? #askriley #random
@thisisTomRiley Yep. Cats. They look at me with 90% indifference and 10% hope.
@mimiXmoo what were shepherds previous relationships like? If there's any background? :) #askriley
@thisisTomRiley I secretly thought he had been in one relationship before with the love of his life that had failed spectacularly.
@LinziD22 MARMITE - Love it or hate it? #askriley @thisisTomRiley Hate it. @GS_AFC did you enjoy filming series 1 or 2 more?
@thisisTomRiley 2, but we missed @manjinder_virk.
@BecRhoades do you still have family in Kent? visit much? I'm not a stalker. I like the shirt you're wearing tonight though. #askriley
@thisisTomRiley You know as well as I do I'm naked.