"Homo sapiens! What an inventive, invincible species! It's only been a few million years since they crawled up out of the mud and learned to walk. Puny, defenseless bipeds. They've survived flood, famine and plague. They've survived cosmic wars and holocausts. And now, here they are, out among the stars, waiting to begin a new life. Ready to outsit eternity. They're indomitable... indomitable."
I believe that Steven Moffat often refers to this as his favorite classic Doctor Who serial, and even though I would bet a lot of money that this won't be mine in the end, I can totally understand why. The script starts out eery and claustrophobic, but even as more and more characters are introduced and the plot expands, that dark sense still lingers until it's conclusion. It was engaging and full of charm from our main three protagonists. Harry is a wonderful addition. Part Four was the one I found the most enjoyable, and I felt as if it wasn't too far off from a Doctor Who episode made today due to its faster pace and multiple layered story lines. If Robot didn't intrigue you and pull you into this new era of the series, The Ark in Space definitely will.
Part One/Two - July 2nd
Part Three/Four - July 4th