And getting back on track, I finally found some time to get caps of The Dominators Sonic screwdriver. Which, to my eyes, is indeed a third version.
Now, it's a bit odd because in the story we see the Doctor first pull something off then slip something else on, which appears to be an handle. And in some of the pictures we can see him using the handle while in others it seem like he is holding the penlight without it but in the same manner.
This one appears to have a smaller, rounder, darker end cap. Still has a pocket clip but appears to have a removable tip, because at one point it is seen to be hollow. And then again it is seem to have the same black end piece.
It's pretty pic heavy so you have been warned.
Here the tip looks to be hollow and it could be but in another pic it appears to be another end cap:
Now that could have been a trick of the light because in later shots it looks hollow again, but here it's either an end cap or just lighting making the inter tube look like a bulbous end cap. Also you can see the handle the Doctor slipped on as well:
In this one the tip looks to be curved like the bulbous end cap would make it but I believe that is just the motion causing it to look that way as you will seen in a the next few pics it looks flat, open and hollow:
A nice shot of the pocket clip:
Here you can see the end tipt looking flat, round and open:
And now two shots shoing the basic body shape, end cap and pocket clip. Also, in all the above pics save the first one you can see the handle the Doctor put on, but in these last two you will notice the handle is absent and it looks just like a standard pen light again. Not the one Straker and Mooneye found either. Which is why in the beginning I mentioned it looks like we do have a third sonic for Pat: