It seems to be the ploy of many TV series to open with a life-threatening scene and just when they have you by the lapels of your coat, up comes '3 hours earlier'!
Episode 1 and 2 is much the same as a 'Prologue' in a book, and probably will in the novelized version.
And, for the time being, will be the opening gambit for this serialization.
Now we go back, to where Harry's problems began.
Also like some TV series, there is another thread of a story running in conjunction with the main story, and will eventually serve as a lead into Harry's second case.
Episode 3 will be available soon.