Doctor Who: The Lonely Assassins

This achievement require you to find 4 hidden images of the Tardis throughout the game.

You must locate all 4 of these and upload them to Osgood to count towards the achievement.

After just finishing the game this is the order I found them in -

1. The first image I found was in the browser. Click into the 'Unknown bookmark' and scroll down until you see the article which reads 'Alabama Blue Box'. Simply scan the Tardis image here and you will have your first of four.

2. The second I found was in the email from the website 'thecraft.web' after Osgood unlocked more data. Click into the link and scroll down until you see a picture of the Tardis alongside the Louvre. (Likely from the Van Gogh episode) Scan and onto the next.

3. The third one I found was in the download folder in the gallery. However, this did not appear until after I beat the angel on the phone and unlocked the achievement 'There's Something on the Phone!'. Simply scan the image here and you will have three!

4. The fourth and final image was also found in the downloaded folder in the gallery. Similar to the third image, this does not appear until after I got the 'Master Persuader' achievement. If you follow the conversation instructions in the guide by @tmw666, you will earn the achievement as well as the last image!

Don't forget to scan all these to Osgood and your achievement will pop!

Hope this helps