... and this is something you don't see very often.... the opening (title) sequence for the entire series, a light bulb dangling in a dark room which gets shot suddenly -- a sequence this reviewer never completely understood -- turns out to be taken from this final episode in the series. Obviously this was re-shot for the DVD collection at a later date (dismissing out of hand the possibility of time travel) but the message remains clear -- this was the definitive episode in the series, the one with the most to say about the lead character. In my review of the series as a whole for the IMDb, I made the point that this is one of the rare examples of a successful novelist being asked to "re-imagine" his own creation for a series, and how Mitchell made TV history by adding layer upon layer of conscience to Callan (not evident in the books) and ended up with a #1 show. This last episode, itself the end of a 2-parter, makes it clear what Callan really thinks of the Service and the way it operates. While not exactly spine-tingling on its own, it does make for a nice wrap-up, and Woodward delivers one of his best performances. Trivia fans will get a kick from the early mention of computers as a time-saving device, this a full decade before computing even became a part of the lingo. Recommended.