Not one of the most eventful Short Trips as it's basically the Second Doctor being visited and annoyed by a temporal glazing salesman and then we cut to centuries later where the Seventh Doctor has locked the window away for reasons known only to him. It doesn't seem like much but under the surface there's a lot of depth to it. The choice of having both the Second and Seventh Doctors at their respective points in life shows how much the Doctor himself has changed over the centuries, not just in appearance but in his hearts. The first half is very lighthearted with the more bouncy and full of life Second Doctor back when life was very simple and easy going. Cutting to years later with the Seventh Doctor in only two pages we get such a clear understanding of how the years have hardened him and why he's locked away a window that shows the place the viewer most wishes to be. It's the kind of abstract thematic storytelling that make the Short Trips some of the cleverest Doctor Who stories ever written