Ford Thunderbird developing a new market segment, the personal luxury car. In 1958, the Thunderbird gained a second row of seats. Succeeding generations became larger until the line was downsized in 1977, again in 1980, and once again in 1983. Sales were good until the 1990s, when large 2-door coupes became unpopular. Initial production ceased at the end of 1997. In 2002, production of the Thunderbird started again; a revived 2-seat model was launched which was available through the end of the 2005 model year. From its introduction in 1955 to its final phaseout in 2005, Ford produced over 4.4 million Thunderbirds.
Thunderbird 2 pod vehicles seen in "End of The Road". No model manufacturer has yet made a "Thunderbird 2" model which incorporates these grabs. The Sealant Device is an underwater machine capable of sealing cracks in the sea bed or underwater air pockets. The device is initially buoyant but can be submerged and towed underwater by Thunderbird 4 to a disaster zone. Four steel pins are then activated which cement themselves into the ground whilst the central section acts as the sealant. The Sealant Device is seen in the episode "Atlantic Inferno". No models have been produced of this device. "Thunderbird 2" is used