Hi mortgagemate,
Had a look in RTE guide and it doesn't seem to be listed for a repeat. There is a website within rte.ie with info from the programme which may be of some help to you.
The case study was two brothers from Ballinasloe - who seem to be quoted in every single article about Montenegro investment that I've read in the past 6 months!
I was in Montenegro recently and was told a story about a bunch of Irish gobsh*tes (three families) who bought a house in a middle of nowhere for 10 times the asking price the original owner had in mind. Allegedly the estate agend chanced his arm when Paddys arrived and got lucky.
I haven't seen the Househunters on RTE but I laughed my head off on my recent holiday.