Thierry la Fronde (Terry the Sling) was a French television series that aired in 1963–66 on the television station, ORTF original script by Jean-Claude Deret. Dubbed into English, it was shown internationally in the 1960s, including in Canada, where it was referred to under the original name, and also as The King's Outlaw. It was shown as well in Poland as Thierry Śmiałek (Thierry the Daredevil). On ABC in Australia, it was called The King's Outlaw. In the Netherlands, 32 of the 52 episodes were shown in 1967 as Thierry de Slingeraar (Thierry the Sling), as a Netherlands Television Service programme.
In 1360, during the Hundred Years' War, France is occupied by the English, and the Black Prince rules France with an iron fist. In Sologne in the heart of France, Thierry of Janville, a young lord, fights gallantly against the English occupation but is betrayed by his steward, Florent, and loses his title and his lands. He then takes the name of "Thierry La Fronde", and with the help of his faithful companions continues his fight undercover.