Police Custody: Sex And Corruption (2017), SBS ONE & SBS HD, 20:35 Thu 23 Aug was marked as a one-off in the IceTV Guide.
However, SBS ONE and SBS HD are also showing:
Police Custody: Attempted Murder, 20:35 Thu 30 Aug
Police Custody: One Punch, 20:35 Thu 6 Sep
Police Custody: The Lethal Weapon, 20:30 Thu 13 Sep
That looks rather like a series to me

In fact, to be specific, from IMDb, it looks like they're random episodes from what IMDb calls, and what SBS used to screen as, the series 24 Hours in Police Custody:
Sex and Corruption: S6E1
One Punch: S4E4
The Lethal Weapon S4E7
and
Police Custody: Attempted Murder appears to be what's in IMDb as 24 Hours in Police Custody: Car Attack, S6E2.
It may also help identify whether these shows are repeats or not.