The position of Jeff's car as he pulls up outside the lock up.
When Jeff is on his way to the Rodens' car repair shop and talks to Marty we can see a bruise under his right eye (a result of his previous fight with Mort Roden and Mike Hales). In the following scene, when he talks to Mrs. Roden his right cheek is clear. Later on, when he is back in his flat and talks to Marty again the bruise is once more on his face.
On departing from the taxi Jeannie says "Goodnight Jeff" and Jeff says "Goodnight Anne", presumably referring to Annette Andre.