they probably started human daleks because they can't afford to make the dalek effects or something. I only saw a half of the 1930's episode so i don't know does the experiment fail.
They weren't human dalek's as such.
They are humans (and presumably possible to be other alien species) which have come into contact with dalek nanites, which change the structure of the human/host in such a way as to remove all their emotion and equip them with dalek weaponry.
But they're not actual daleks. On the planet they were on, they were supposed to be security for the planet. Anyone who crash lands gets turned into one, and is then used as a method of dealing with any rampaging daleks or other hostile beings come to investigate, or release the prisoners.
They're likely not as smart as regular Daleks, and can be controlled by them. They're also undoubtedly looked down upon by regular daleks.
Human Daleks, as in the Series 3 version as Corbiere mentions, were actually humans being converted into full and proper daleks, in the hope of recreating the (at the time) almost entirely extinct Dalek Race.
Unfortunately, this backfired due to the incompatibility of human emotions with Dalek DNA, and also due to the Doctor's own interference.
so what judging by the next episode preview amy and rory are still the companions?
Anyone know if this is for the whole season?
The show is being done on a different schedule this year (and will possibly be the norm for the next year).
There will be half of the series shown every saturday, starting Saturday 1st September.
Then it will likely take a short break and have the Christmas special, as is normal.
On the Christmas special, they will introduce the new Doctor Who Companion.
Then, following the Christmas special (not necesarilly straight after. There might be another short break, may start in the new year), there will be the second half of this series, in which only the current Doctor and the new Companion will feature.
This does mean that Amy and Rory will be leaving the show come Christmas.
It's not known how or why (in terms of Doctor Who storyline) they leave, but they have already said that they will be gone.
It'll make them the longest running companions of the revived Doctor Who series, however, at 2 and a half series.
The second after that is Rose Tyler (Billie Piper) who had 2 series back to back, and numerous cameos.
It'll likely not be the last we see of Amy and Rory. No doubt they'll come back in some finale or another for a one-off, as many of the other companions have, and will likely still be included in the Doctor Who Magazine comics and Annuals.
That's because the Britons call "seasons" "series"
I've always used them sort of interchangably, but that might be myself being americanised by american media.