What if Chris Thorndyke had been in the Fleetway continuity?
My take on the idea.
Draw on paper then Wacom'd for ink, colour and shading, and then PS'ed for the text, backgrounds and effect in the last panel.
Three points to make:
1) Don't be hesitant about adding in highlights as well (usually to a much lesser extent than shadows on skin/fur); I'd go for about 30% opacity with white around the relevant areas.
2) Sonic seems to have a double outline; the black and then a white rim; that could do with getting rid of.
3) I like the blurring on the last panel, so don't knock it; possibly just pull it out a little bit to make the whole face unblurred, but that's all.
Other than that, a great piece of work. Especially liking the Sonic poses.