Doctor Who versus Darth Vader

The source of the image is here. It was created by *Drombyb and it was categorized as Fan Art / Digital Art / Painting & Airbrushing / Movies & TV.

As it is said in the description of the image:

This is actually a request from Arosenheim : How about an image of the Doctor using his sonic screwdriver on the Dark Lord of the Sith, Darth Vader, and depicting that his lightsaber won’t light up. (Perhaps like an motion similar to you and I tapping a flashlight with the palm of our hands when it won’t light.) 

Note: the two female Togrutas in the background are just random characters.