Ahahaha, guys. Jack vs. the Empire!
OK, so a recurring theme in these is Jack's past, Jack's morally questionable decisions as a Torchwood employee in the past. I think "I was just following orders" is going to be an important statement for Children of Earth, and I think the arc is going to be about Jack realising that just isn't good enough. Especially for a man like him, a man who lives forever. He's always going to have to face the consequences of his actions, he is always going to live to experience them, sooner or later.
As miffed as I am that Torchwood Three got to go to India and ended up (quite literally) taking the imperial nostalgia tour, and interacting mainly with a white British Duchess, they were also at pains to point out the fallacies and problems of Imperial India. It's time has passed, and the Duchess is trying to hold on desperately. The choice of a members' only club is kind of perfect: trust me, having been in a couple of ex-colonial clubs they are freaky little time-capsules with stuffed tigers decorating the hallways and archaic dress codes and black-and-white Raj nostalgia photographs framed on the walls. James Goss has clearly been reading quite a bit of William Dalyrymple.
Gwen is working for me so much in these radio plays. Her little snarky, friendly exchanges with Ianto. Her affronted voice when Mr. Das tells her to 'have a lie down' to calm her nerves! It's also partially because Eve Myles is a wonderful voice actress, very expressive in a way that really comes across over the radio-- just like Freema Agyeman. (The audiobook In The Shadows is read by her, and I think Eve imitating Jack and Ianto's voices/styles is just the cutest thing I've ever heard.)