Via BBC News:
Filming of US television show 24 has been suspended so that its star and executive producer, Kiefer Sutherland, can undergo surgery. Twentieth Century Fox Television would not give details about the type of surgery involved, referring to it only as a “medical procedure”, but reports on other sites say the surgery was to fix a ruptured cyst, near one of the stars Kidneys.
Shooting is expected to resume again next week when Sutherland returns. Fox said the filming delay should not affect the on-air schedule of the show, which is now in its eighth series.