Season 1 Disc 3
Fortunate Son: Some of the new shots, with the ECS Fortunate looks really good, the stock footage is still the same.
Cold Front: Just as with Fortunate Son, the new footage, especially the stellar nursery looks good.
Silent Enemy: Average looking episode, nothing spectacular here besides a good story.
Dear Doctor: I was somehow amazed with the city shots. I don't know, maybe it was me, maybe something other but this episode is really good but:
Sleeping Dogs : Now this episode (beside stock footage) looks good. The quality for live action and CGI is just good. It isn't amazing (well, maybe the live action shots come close, but still not there) but it is really good, maybe the biggest improvement overall to the DVD. The gas planet and the Klingon ship looks great in HD.
Disc 3 Special Features:
Deleted Scene--Sleeping Dog: It is more of an extended scene than a deleted scene, but nothing important.
Archival Mission Logs (Star Trek Time Travel: Temporal Cold Wars and Beyond / Admiral Forrest Takes Center Stage): Some nice extras, I like how the first documentary presents the time travel episodes from the different series, and also the Admiral Forrest bit is fun.
I will give a 4/5 for this disc especially for Dear Doctor and Sleeping Dogs as they are really showing their quality over the DVD release. These two episodes just shout: this is why it is worth to buy the blu-ray discs. Too bad this isn't the standard for all the other episodes ...