Meanwhile, the team’s personal lives are examined more closely this time, as Teyla (Rachel Luttrell) becomes pregnant, dreadlocked beefcake dude Ronon (Jason Momoa) considers rejoining his original tribe, irreverent hero Lt. Col. John Sheppard (Joe Flanigan) returns to Earth for his father’s funeral (where he runs into his ex-wife and estranged brother), and genius scientist Dr. Rodney McKay (David Hewlett, a good actor whose character’s incessant glass-half-empty, pessimistic whining is getting a bit old by now) once again meets up with his sister, who also made an appearance in Season Three. Overall, the fourth season contains several terrific stories (like “Adrift,” in which the entire city of Atlantis heads into space in search of a new home planet, “Tabula Rasa,” in which the crew is infected with amnesia, and “Trio,” described by its creators as the most logistically complex episode of the entire series), and a smattering that aren’t so hot. As always, Atlantis has terrific special effects, sets, and action (this show ain’t cheap to produce, and it shows), plenty of wit (Sheppard, upon being served a strange-looking meal by his captors: “Is that a form of torture?”), and a very generous selection of bonus features, which include commentaries for every episode, featurettes, and photo galleries. --Sam Graham

Beyond Stargate: Atlantis – Season Four on DVD

Stargate: Atlantis – Season One on DVD

Stargate: Atlantis – Season Two on DVD

Stargate: Atlantis – Season Three on DVD