Just to clarify: everyone is in Southampton.<br/><br/>Marta and Sissy are eating breakfast at a restaurant overlooking the port.  Nearby, outside, Lt. Walker pulled up in his car.  The Doctor is with Kitt’s character closer to the boat.<br/><br/>So, Marta is with Sissy, but sees Lt. Walker.  Sissy, I guess, would also see Lt. Walker, but she doesn’t know him as far as I know.