Oops! You need to enable JavaScript in your browser to start watching. ITV3 Heartbeat My One And Only Series 18 - Episode 21 - Nostalgic police drama series. The murder of an insurance salesman produces some remarkable suspects and Miller is surprised by a face from the past. Tue Tuesday 23 Oct 1.35pm 60 mins 5 days left Share this episode: Share on Facebook Share on Twitter Share on Google+