It's not perfect, but for a first attempt at this kind of thing I am very chuffed with myself.
Thanks to all of you on my f-list who helped me with my various questions, in particular maubast and goodnightlady, who both sent me some very useful information.
And a 'warning' to my ncis_gibbsducky, I shall be
Oh, and the gorgeous icon with this post is the other one that the lovely crimson_37 made for me.
IMPORTANT EDIT: I inadvertently omitted to give credit for the screen caps I used in making this theme. I apologise for this oversight.
They came from a variety of sources mainly: dj_capslock, bunny_pics, toomuchfandom and bluster. Thank you to all of you for sharing these images.