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In page Science fiction on television:

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In general, science fiction series are subject to the same financial constraints as other television shows. However, high production costs increase the financial risk, while limited audiences further complicate the business case for continuing production. Star Trek had a per episode budget of $175,000-$190,000[1], while Star Trek: The Next Generation had a $1.3 million budget per episode - one of the highest at the time.[citation needed][2]