This study investigated the effect of the emotional content of television news programmes on mood state and the catastrophizing of personal worries. Three groups were shown 14-min TV news bulletins that were edited to display either positive-, neutral- or negative-valenced material. Participants who watched the negatively valenced bulletin showed increases in both anxious and sad mood, and also showed a significant increase in the tendency to catastrophize a personal worry. The results are consistent with those theories of worry that implicate negative mood as a causal factor in facilitating worrisome thought. They also suggest that negatively valenced TV news programmes can exacerbate a range of personal concerns that are not specifically relevant to the content of the programme.