1/4 The Highlander minus swords +
1/4 Sherlock Homes minus Watson +
1/4 shows that have done this plot and failed (Amsterdam & Moonlight) =
Every 'twist' was predictable. Every character a cliche. Female cop love interest, seriously? Even the 'big reveal' <spoilers> that Judd Hirsch's character was found and raised from a child in WWII by the main character is straight out of Highlander. They even run an antique shop for goodness sake!
Ioan Gruffudd is an admirable lead, but I don't think his appeal alone can save this show from a swift mid-season cancellation.