Castorr and his wife are being greeted at Buck Palace. The trip to England was around the time Castorr was getting involved in the Guns for Hostages situation

See The Parkland Cuban and L Robert Castorr. Castorr and his wife fit the descriptions given by Nancy Perrin Rich of the Colonel who was at meetings with Jack Ruby, herself and her husband, along with a few others for discussions on running guns to Cuba. Since Castorr remarried in the years following the assassination, he either had a thing for "manly" women, or was having an affair with the woman who would become his second wife while still married to his first.