Re: New Here: Klingon Question
To be honest, I think it's one of those things that most fans would have been happy to accept as a "fact of life" - i.e. we all know Klingons look different in TOS because the budget was smaller, but in our minds we're happy to ignore that. Suspension of disbelief.
Unfortunately, the (great) DS9 epsiode "Trials and Tribbleations" ruined that - put Worf together in a room with TOS Klingons, and one of the characters is going to say *something*!!! So they had to come up with a canon explanation for it.
TBH, I've never watched Enterprise and never will, so I just assume they always had the bumpy foreheads. :P (and just put "Trials" out of my mind)....
No they didn't have to come up with a canon explanation they could have just left it as a mystery.
WORF: We do not discuss it with outsiders
Acknowledge it and move on.
On the continent of wild endeavour in the mountains of solace and solitude there stood the citadel of the time lords, the oldest and most mighty race in the universe looking down on the galaxies below sworn never to interfere only to watch.