JesusChrist wrote: All you need to know is: The Doc never actually impregnated a woman [so far in the show]. He actually cloned the boys from his DNA. The boys regularly die throughout their lives, and he used to have this basement full of clones so when the current hank and dean died he could replace them instantly, even give them the memories of the previous incarnations. In the last season finale [like 2+ years ago] the government discovers his basement full of clones and order him to shut it down. So now if this Hank and Dean die, they die for good
Actually, and this is straight from the writers...and I don't really think it needs to be spoiler tagged 2 seasons later.....
They are clones of themselves. They were born the normal way. They've been cloned about 14 times, I think. In Sunday's episode, Brock says the boys int he submarine were the "sevens." He says something like "Oh, so that's what happened to the sevens."
This isn't the first time they've run into their clones. In earlier episodes, Hank and Dean entered Doc's clone lab, but were convinced they were a Christmas present (these were all destroyed at the end of season 3 in a pretty crazy battle between the OSI and the Monarch on the Venture Compound). Hank hit one of the Dean corpses with Doc's car, and thought he killed his brother. A Dean clone survived/was abandoned and had been living in the Ventures' attic for many years, and tried to kill the current Dean. And now they've seen their corpses in the submarine in their father's body (but were obviously convinced it was something else).
The submarine incident did not occur in any episode. In fact, aside from the episode where Doc and Brock reminisce about all the times the boys have died, and the actual episode they died in, at the end of season 1, none of their other deaths have been within the show itself.