Fantomcat is a British animated series produced by Cosgrove Hall Films. The main character of Fantomcat was influenced heavily by Zorro, Errol Flynn and Fantômas, and the series itself was influenced by Batman: The Animated Series and the time-lost approach of both Adam Adamant Lives! and Gargoyles.

Fantomcat centres on the character Phillipe Lentheric Guerlain de Givenchy, the Duke of Fantom, a masked swashbuckling hero who thrived in 1699, in mortal combat with his archnemesis Baron Von Skeltar. De Fantom was treacherously cast into a painting within the halls of his house, Castle De Fantom, and became trapped for centuries. As time passed, the area around Castle De Fantom became a bustling metropolis called Metro City, a city submerged in crime rings led by the fiendish arachnid Marmagora.