Regarding the speculation of whether it's actually Old or Doc pretending to be Old ---
One thing that Old is much better at hiding than Doc is. Remember, Frans couldn't see Old but had no problems finding the Doc under the table. This guy got caught. To me that's a big tell that it's not Old.
It's night in Washington DC, and night... wherever Old was hiding, which was within helicopter range of Washington DC. So the retreat was somewhere west or east of the US eastern time zone. Maybe western Canada, or somewhere in Europe.