When did The Block Season 4 Episode 51 air?
The Block Season 4 Episode 51 aired on August 21, 2011.

After eight weeks of exhausting renovations all four houses are finally open for inspection and then go under the hammer at auction to decide which couple will take out the $100,000 prize.
Direct answers for episode-level questions and details.
The Block Season 4 Episode 51 aired on August 21, 2011.
This episode runs for approximately 84 minutes.
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