Hi,
this has come up between Louise and me, and I am thinking of it now as Matt mentions Straker's age being 48 in 1986. This would place it smack right where the main parts of the series are.
Now - to me it is entirely incongruous to have someone who very obviously is UNDER 40 being called 48, thus nearly 50. That's a time difference for the face and body you are looking at of 10-11 years and it's a time difference which - for most people - really marks the difference between young and middle-aged (lookswise).
It takes a major effort in the make-up department to make someone aged 37 or 38 to realistically look like nearly 50. And going by the real Ed Bishop, it's even easy to see - major difference right down to changes of the basic facial structures and muscular/skeletal changes to the body.
I know there is a B-date for Straker flitting around somewhere of 1938. As I am pretty sure that's not mentioned anywhere in the series, where does that come from? Fanon? Or the extended UK DVD set?
I think it would be a good idea for every writer to - sort of - "time" Straker as per his or her UFO universe, possibly giving detailed reasons for that take, because else others might be brought up short or place stories in the wrong time bracket.
E.g. my take is different from Matt's by 10 years on Straker's age and additionally I usually advance my stories 10 years into the future (making our "now" the time of Confetti Check).
I use the biological age of the actor(s)
at the time of production to "time" Straker (Freeman, Foster etc.) as correlated to the series.
I do that because I do not get any other source to put an age on Straker, plus the production used quite considerable means to make Bishop look
younger as the freshly married Straker in Confetti Check and Identified. In case the DVD set has put a date to Straker such as 1938, I'd have trouble a) seeing that as canon (it isn't) and b) believing it (Bishop quite simply looks 10 years younger).
This means the following - for my stories (dates in [brackets] mean the dates as transposed to the here and now.
[2010] 1970 - marriage/commission to build SHADO (aged 24)
[2017] 1977 - birth of John/divorce (aged 31)
[2020] 1980 - fully working SHADO (Identify) (aged 34)
[2024] 1984 - John's death (aged 38)
[2026] 1986 - end of series (aged 39-40)
This gives me a B-date of 1946 (within the series' timeframe) and of 1986 within my (futurized) timeframe.
Oh, yes, I am aware that the script of QoP says that Mary and Ed stayed married 3 years after birth, but actual canon (which for me equals what you see and hear onscreen) makes that rather implausible with the later filmed Confetti Check having her move out of the house when the baby is born and believing her husband to have cheated on her. The logic of continuity says she left him then, not three years later.
I also know that some say he'd have been too young as a colonel. Fact is there were even generals as young, not to speak of colonels. It all depends on what war they were in and what needs had to be met.
Any which way, the above is how I time my Straker and stories