Stargate SG1 - Show and Tell

It’s time for Show and Tell! How many times is Charlie going to come back to remind us that Jack was a dad? Why did it take so long for SG1 to believe that Mother was really there? How exactly can the Reetou interact with us if we can’t interact with them? Also, are the Reetou a rejected Doctor Who villain? And why do they cause Tok’ra and Jaffa so much pain? Was Charlie made from Jack’s DNA? For being touted as such a horribly dangerous enemy, why are the Reetou never heard from again?