I had intended to mention this earlier, but it slipped my mind. RTE showed a two part documentary on the 20th century history of Irish missionaries.
There were some political and religious views that caused me a little disquiet and there were a few, sort of, 'National Geographic-like' images that I wasn't sure about, but overall it was a story worth telling and it was well told.
As well as spreading the faith, the missionaries were, as President Mary McAleese says, ambassadors who "have done Ireland no end of service." Unfortunately it's a service that's winding down now as there are virtually no young missionaries these days. What they accomplished and the trials they endured (or didn't - many died before reaching age 40) is a story all Irish people should know.
RTE has made the two parts available to view (until the March 23) for people outside Ireland. Each episode is 50 minutes, but it's worth while. Part I is here and Part II here.