I have just watched the Christmas episode, and could not help but admiring Jacks Jumper/pullover's, and the woollen jacket. Are they available for sale.
I was wondering at the time of viewing is this a nod towards the Scandinavian series "The Killings", or maybe He's got a new wardrobe budget/payrise from the police force LOL.
I know! They're so adorable and it's nice to see Jack out of his one suit.
I'm not sure if that particular sweater is available for sale. It may even be a vintage find, since the customer designer for the show is known to use a lot of her own things to dress the characters, especially Phryne. But that style of sweater is fairly common and you should see a lot of options pop up now that the weather is getting colder. Maybe you could also try googling "men's button neck sweater" or "men's shawl collar sweater"?