Mate, cant tell you when it will be on TV but if you really want to see it visit http://www.submarinesaustralia.com/ and click on the tab marked 'Slops Van' . You can buy a copy for about $25.00, don't know what postage to the UK would be though.
The best bit of that series was the opposed transit between the two(?) islands. What with Yank skimmers blasting away on active sonar and angry palmtrees flying hither and yon (and a PC3or two) and making more noise than a noise factory. Guess what...the ASW forces didn't get a sniff and they knew the track of Rankin. Well I 'spose it goes to show once again that saying ASW on the tin means diddly squat ifn you aint any good at it! Amateurs pah!