Thierry la Fronde (Terry the Sling) was a French television series that aired from 1963 to 1966 on the television station, ORTF. The original script was by Jean-Claude Deret.

Dubbed into English, the series was shown internationally in the 1960s, including Canada and Australia, 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.