Let the speculating begin

We know that the US version of Life on Mars will have a different reason for Sam Tyler being in 1973. We also know that episode 2 is adapted from episode 2 of the original series; episode 5 is where Sam meets his mentor (originally a second-season episode in the UK) and episode 6 in the US is adapted from episode 6 in the UK. We can probably guess that the season finalé is based on the British one given what we saw when Sam travelled back to 1973.
   But if the reason for Sam being in 1973 is different—all 13 options are revealed this Thursday Stateside—then let the clues begin!
   1. Colin Raimes lives at the Cataldo House Apartments, which have ‘Since 1973’ on the sign at the front. This is not a coincidence.
   2. Sam’s Jeep Grand Cherokee in 2008 has the licence plate ACX-7012. Anyone catch the plate on his ’71 Chevrolet Chevelle SS?