Good writing, acting, cinematography, and direction, really pays off in this time travelling who-done-it, that spans over 150 years and 4 different detectives perspectives. Yes a bit of a trope theme, but it's entertaining - I love the fact they had the guts to go back a 130 years and forward another 30. That was a nice touch and leveled this show up from "historical murder mystery", to a future-forward quantum entangled one.
Yes quantum theory is all the rage - but who can resist a quantum state superposition? A system able to be in all states until measured? Perhaps a bit like the human soul, or people's inner most dialogue(s) and intentions (see what I did there?).
One caveat. I'm assuming there's an alternate universe where I didn't write this review, or in our current iteration where Quantum theory is disproved, or changed, and the show is as farcical as some that have come before, but good writing, acting, cinematography, and direction, generally lands well in any time period. IMHO.
Btw, I give things 10/10 as a show of gratitude to the work the team does to bring a production to life - it's probably an 8/10 - but is also a 10/10 too.