And just like that ... we're back in our other life.
The return went just as planned; we think we've gotten a handle on the train thing. The French TGV arrives in Paris at the Gare de Lyon, the Eurostar leaves from Gare du Nord. There's an underground RER (the system that travels to the Paris suburbs as opposed to the Metro which is just in the city) that only has a couple of stops between the train stations. The hotel we were staying in for the night was right by the Eurostar station so we wouldn't have to hike to far in the morning.
The Eurostar stops in St. Pancras station in London. Jump on the Picadilly Line of the London Underground and about an hour later you are deposited at Terminal 5 from which at the BA flights depart. The only hard part is getting from the LA Airport to Ventura. I think, per mile, that was by far the most expensive part of the trip home!
The front door key worked and, since we'd given the house a pretty good cleaning before we left, all that we had to do was collapse into bed to begin recovery from jet lag. Monday morning it was back to work for both of us.