After some interesting episodes came this one. And I really don't get why writers went in some haunted house story. This was just so out of place in sci-fi serial, even if this is not strictly sci type fi - science is not much accented, nor is much accurate.
I watched it till end, but 3 days later barely remember plot, dialogs.
Next 2 episodes were better, but not on level of episodes before this. And that was it ...