During the first two series in 1973-74 it was ordinarily produced by David Hatch, but occasional editions were produced by Richard Willcox (with both men credited on the 1974 summer special, "Hello Summer") From series 3, in 1975, it was produced by Bob Oliver Rogers (with David Hatch returning briefly to produce some editions of the final series, aired in 1979, due to Bob's unexpected death).