Episode 3 was really great. And the actor who played the old man immediately was familiar to me but I couldn't place him. I got him from the credits at the end and plugged into IMDB and it turns out he played Captain Jellico in TNG's The Chain of Command
19 years ago.
"The object of opening the mind, as of opening the mouth, is to shut it again on something solid." - GK Chesterton