It's another shortish one - On Holiday By Mistake by my lovely friend sassysailorgirl, from almost exactly 4 years ago.
Summary: Jack & Ianto travel to Glasgow, Scotland to help "Tartan" Archie deal with an alien lake monster.
Part 1 Part 2 Part 3 Part 4 Part 5 Part 6 Part 7
And that's it for this week. Happy reading, everybody!