'Prodigal Son' fall finale ends in cliffhanger as hunt for The Junkyard Killer goes on

Spoiler alert for 'Prodigal Son' Season 1 Episode 10 'Silent Night'
The fall finale episode opens with Ainsley's (Halston Sage) interview with The Surgeon (Michael Sheen) finally on air. It creates waves as the explosive interview becomes the hot topic and the press swarms outside Jessica Whitly's (Bellamy Young) house and just like that, The Surgeon took over their lives once again. Even with Christmas around the corner, there is doom in Jessica's house.
The NYPD is still hot on the hunt for The Junkyard Killer, but they don't know it yet. With the FBI taking over The Junkyard Killer case, the NYPD shifts their attention to regular work. An honest detective is murdered and at first, it looks like a double homicide, but Malcolm (Tom Payne) is led to another cop who was once investigating The Surgeon's case.
Both their stories are the same: The Surgeon's case had become very personal to them, which was eventually taken away from them. Their individual investigations lead them to the house of a certain John who worked as a clean-up man for The Surgeon. Nailing this man would mean that they pretty much have their hands on The Surgeon.
So the two together get on with an investigation of their own. At John's house, they meet his grandmother and assume that she is unsuspecting, old and senile. Only to be proven so wrong. Needless to say, this little independent meeting sans invitation goes awfully wrong as John shows up and he is none other than The Junkyard Killer — the same killer who accompanied Malcolm and The Surgeon on the boys' weekend at the cabin.
And he knocks Malcolm out. The episode ends with a flashback of a conversation between Malcolm and The Junkyard Killer just as they are about to leave for the weekend. And that is it.
We were hoping that before 'Prodigal Son' went on a break, the show would have told us a lot more about The Junkyard Killer, any clues on what happened on that trip and exactly how Malcolm was associated with it. The episode featured very little information about the case we have all been following this whole time. And we must point out that it was a disappointment — almost makes us not wanting to return after the fall finale.
'Prodigal Son' will return in 2020.