A sub-orbital aircraft named the Spindrift flying from Los Angeles (In the actual series and unaired pilot it was NEVER New York) to London is pulled into a space warp which transports its crew and passengers to a planet where everything is 12 times larger than normal. In their first night on the planet they are attacked by a giant cat and two of their party, Captain Steve Burton and movie star Valerie Scott, are captured by a pair of giant scientists but are eventually rescued by the rest of the castaways. Unfortunately, they soon realize that for the time being they are stuck on this strange world.