Written by Lloyd Woolf and Joe Tucker, the first series saw ordinary flatmates Leanne (Howard) and Rhona (Boyle) thrown in to witness protection after accidentally seeing a gangland shooting.
After the pair become deeply entangled in the criminal world they were trying to escape, while series two found witless wonders on the run again when their ‘safe house’ was no longer so safe.
Producers say the third run will see Leanne and Rhona getting closer to the end of their ordeal – but whether they make it out unscathed remains to be seen.
Shane Allen, Controller of Comedy Commissioning says: “Witless is the dream BBC Three sitcom – a whip smart concept, knockout funny writing, the dream double-act in Kerry and Zoe, a cast that launches new talents in a big way and highly ambitious direction.
“It’s got the lot. Here’s to going out on an adrenaline high.”