Oh, good grief, you've done it again - not only great characters, but the storyline is...I just sit there going, ???WHHATTT??? then ????WHAT NEXT????, then "WHEN'S THE NEXT BIT?
Shades of MIB, and plausibly developing the passage of time, and giving Andy a plausible and likeable and useful reason for being, and making the kids work, (not just in the sense of WORKING), and always paying attention to Ianto and Jack's relationship. Please, please, keep it up.