The Block 21-4

Work on the challenge apartment begins and when the treasurer and project manager is appointed, alliances are formed and things get off to a rocky start.

Its Comedy Night on The Block as the teams try their luck at stand up comedy, with reluctance from some contestants. There's a share in $5000 cash for the funniest fans and faves.

Sarah and George are down in the dumps and have a message for the judges; Keith sparks up at Harry.