The 8th series of Heartbeat, which aired in 1998-1999, ranked the 5th with an average audience share of 14.35m.
[['8', 'RANK', '5th'], ['8', 'AVERAGE_AUDIENCE_SHARE', '14.35m'], ['[TABLECONTEXT]', '[TITLE]', 'Heartbeat (UK TV series)'], ['8', 'YEAR', '1998-1999'], ['[TABLECONTEXT]', 'SERIES', '8']]