Early 1981 also saw the departure of the longest running Doctor, Tom Baker. Having caught up from the 1981 hiatus by screening all of Baker's final season four nights a week during March and April 1982, the ABC continued screening the series almost as soon as it had been shown by the BBC. The ABC screened Peter Davison's debut in "Castrovalva" at the end of April, just three months after its UK debut. For "Doctor Who"'s 20th anniversary in 1983 the ABC provided some production funding for the special 90-minute anniversary story, "The Five Doctors", and made a greater-than-usual promotional effort, screening it just 18 days after its UK broadcast. (The nationwide visit by Peter Davison earlier in 1983 had been organised by a department store chain!).