Ashes to Ashes

[Nitrus]

Tools, first scene was in a garage so that makes sense.

Voiceover could be the introduction "My name is Alex Drake..." could've been re-recorded or something.

Photo, could be the one of Sam Tyler, which is fairly key to everything going on in the back of the storyline.

Shallow graves, the murdered girl they found was in a shallow grave.

Carving, well that's the date in Alex's desk, which we don't know anything about.

Dunno about the rest tbh, but I've only seen the episode once.