ROB "WHO?" HEYLAND starred as stupidly named "zoo vet" practicing in 1960s backwater of Britain where no-one had seen an elephant before. Initially hyped as latest Sunday-night ratings beater, series succeeded in clearing the stage for grim HEARTBEAT and PEAK PRACTICE domination a decade down the line. Later episodes rubbished Noah-sentiments of the title still further by moving to, erk, a safari park.
Yes, it was 'One By One'. If I remember correctly, it was the zoo equivalent of 'All Creatures Great and Small' in that it was based on a zoo vet's actual memoirs.