There is currently no known as-broadcast copy of this edition in existence, although a recording lasting around an hour and ten minutes survives of all the unedited studio footage from July 2nd 1968. Network edited this material into episodic length for their 2010 DVD release.
Sarah Pringle refers to Lonely as "Mr Bellamy" - this is the only occasion where he is given a surname, though there is no indication that it is actually his real one.
With regards to all the black and white episodes that exist in the archives, the above episode reveals more about Callan's background and in some depth.
Tessa Wyatt (Sarah Pringle) was later one of the leads in Robin's Nest (1977); Allan Cuthbertson (Colonel Pringle) appeared as a guest in England Expects (1978).