Harkins was a pretty major mid-level television and film character actor for thirty years at least. He played judges, crooks, lawyers, businessmen, etc, on many weekly shows, particularly in the 70s through the early nineties. I found his transformation from Costa to Garth Blackwood amazing, not just for the fact that costume and makeup completely changed his appearance, but because his use of dialect and physical approach to the character also changed him completely.
Petofi