Many Splendoured Thing - S12.E9

It is Christmas in Aidensfield and Lord Ashfordly decides to throw a ball to celebrate his marriage, but his elegant young bride is not what the locals expect. Vernon jeopardises Bernie's funeral business by finding a more festive use for the hearse. Tricia also gets the wrong end of the stick at the Christmas party. She thinks that Mike is proposing when he gives her a jewelry box, however it only contains a locket but she manages not to let him see her disappointment.