Just so people don't have to do it themselves:
http://www.bls.gov/data/inflation_calculator.htm says that $1 in 1965 dollars is worth $6.93 in 2010 dollars, so the $12,000 over the stated budget equals $83,115.43 in today's terms. That $215,644 for "total costs excluding overages" equals to $1,493,611.96 in 2010 dollars. "Adjusted total costs including overages" of $299,974 equals $2,077,705.63 in 2010 terms. If it went $12k past the "adjusted total costs" in 1965 dollars, thus, that pushes it up to approximately $2.1 million for
one episode in 2010 terms.
Pretty expensive, even taking into account the fact of it being a second pilot.