There is at least one episode where that loveable façade is cracked. In Episode nine, they have conned another rogue out of some money, and Thomas wants to use it to follow his dream and immigrate to America. Sarah, fearful of the change, tells him she's pregnant, and they use the money to open a haberdashery shop. When Thomas eventually discovers the lie, in a drunken fury he goes after Sarah with a belt. He doesn't actually beat her, but the whole incident seems out of character. Thomas may be a reprobate, but he is not physically abusive. Indeed there are episodes where his actions and indeed Sarah's as well approach noblity. Perhaps this kind of inconsistency in characterization is the most disturbing quality in the series. On the other hand, Thomas and Sarah are fetching characters who for the most part remain sympathetic in spite of themselves, and watching this series of their misadventures is good fun.
The current release is a four-disc set which notes that due to the age of the originals has some uncorrectable flaws in sound and picture quality, but whatever flaws there might be were negligible. There is no bonus material.