Hardy worked extensively on BBC Radio 4, particularly on "The News Quiz", "I'm Sorry I Haven't a Clue" and his long-running series of monologues "Jeremy Hardy Speaks to the Nation". His excruciatingly off-key singing was a long-running joke on the radio panel show "I'm Sorry I Haven't a Clue" — on which he appeared regularly — as well as the spin-off radio series "You'll Have Had Your Tea: The Doings of Hamish and Dougal". He appeared in the Radio 4 sitcom "Linda Smith's A Brief History of Timewasting", and he also appeared as a panellist on the first and second series of "QI". His experiences in Palestine during the Israeli army incursions of 2002 became the subject of a feature documentary "Jeremy Hardy vs. the Israeli Army" (2003), directed by Leila Sansour. A four-episode series entitled "Jeremy Hardy Feels It" was broadcast on Radio 4 in December 2017 to January 2018.