I'm still putting a teeny wager on Andrew Laverty coming up.... I may be wrong (!) but -
We never got to see him in s1
Only a small mention that he and Jackie divorced, but he was a millionaire...
If they divorced, why was Jackie buying properties, like the hairdressers, for the OCG to money launder... was it as the money was tied up in them from Andrew, or maybe she just burned through the money herself and took a huge wrong turn with her investments....
I think something will come up as they're looping so much back to s1 and Jackie's been brought back up a few times (and out the freezer!)
I'm intrigued if we see PC Bannerjee again, he was the nice PC and who tried to help Ryan, had he stayed clean or now bent....?
And something someone said on another thread, in s1 when young Ryan is being interviewed by Kate, he has an entourage as he's young/vulnerable, one of which is his social worker Jane HARGREAVES.... was she any link to Les HARGREAVES, exposed as linked to OGC and a balaclava man in s5 then killed....
Also nothing more from Nigel Morton.... (medically retired but was faking it)
And I agree with the posters mentioning Steve's old boss in s1 (who tried to get him to change position on the terrible raid which ended up at wrong door number)- something will come back up with him.... he's ducked in and out of a couple of seasons so stayed around....