00:00  Orchestral introduction. 
00:15  Leporello enters singing of his frustration why he must  wait outside and wait for the Don who is inside with  the lady.
01:45  The Don and the lady enter arguing about him staying and  showing who he is. Leporello hides.
01:57  Leporello joins the singing greating an ensemble but is  not interacting with them, just commenting about his  fears of being discovered. 
02:31  Notice the increased activity of the singing and the  fluid fast melodic lines (declamatory) which are  naturally complimented by the Italian language.
02:55  Leporello sings fast nervous lines while Don and the  ladys staccato lines act as accompaniment.
03:05  The Commandant appears, tremolo in the strings. He argues with Don Giovanni.
03:52 Orchestral interlude.
04:09  The Commandant is wounded, the music slows and after his  last gasps, he dies.
05:05  Short orchestral interlude.
05:19  Leporello and the Don use a recitative to dialogue about  the event that had just taken place.
05:39  End of scene.