Petlyakov Pe-2 ?, although there is normally a small turret to the rear of the canopy glazing.
If I'm right, then Nuuuumaaan, your up next
For info...and I'm not having a go !...who-ever correctly identifies the mystery plane then posts the next one for us to scratch our heads over, otherwise it can become a bit of a free for all with mystery ships appearing left right and center. It also adds a bit of an incentive to be more devious and creative when we post the next one as it give a lot of satisfaction knowing that a lot of peeps are going crazy searching their grey cells / google...delete as appropriate !...in an effort to get it first !