an exchange between Apollo and CIC where Tigh tries to relieve Apollo of command. In a third deleted scene, Head Six tells Baltar that only he will live to see Earth. The piano piece Starbuck and Helo listen to is "Metamorphosis One" by Philip Glass. The end of the piece is featured at the end of the episode. Glass's music was often used for temp tracks during production of the series. The microcassette format she uses is an homage to the film A Clockwork Orange. When Tyrol and Cally rejoin the others, they use a countersign, a kind of challenge–response authentication, in which one party says "flash" and the other "thunder". These were the challenge and password, respectively, used by Allied soldiers on D-Day during World War II. Actress Katee Sackhoff (Starbuck) played a large role in planning the look and feel of Starbuck's apartment. She and actor Tahmoh Penikett (Helo) did much of the painting on the walls and the canvases strewn about the room. Reception "Valley of Darkness" received a nomination at the 2005 Visual Effects Society Awards for the Centurions, in the category "Outstanding Performance by an Animated Character in a Live Action Broadcast Program, Commercial, or Music Video". It lost to the following episode, "Fragged", which won for the Centurions in that episode. "Valley of Darkness" received favorable critical review. Jen Segrest of AOL's TV Squad commended the scenes between Starbuck and Helo and said the final confrontation with the Centurions was "a [scene] you'll want to rewatch a few times in slow mo." Susan Tankersley of Television Without Pity gave "Valley of Darkness" a B+. Simon Brew of Den of Geek praised Tyrol's scene with Socinus, calling it "moving". Eric Goldman of IGN ranked Tigh taking command at #11 on his list of the top 20 storylines and moments in the re-imagined Battlestar Galactica. Connection to other series elements The image painted on the wall of Starbuck's apartment, three concentric, colorful disks, reappears in the Temple of the Five in the third-season episode "The Eye of Jupiter". "Metamorphosis Five" is also featured in the fourth-season episode "Someone to Watch Over Me". Notes References External links "Valley of Darkness" at the Battlestar Wiki "Valley of Darkness" at Syfy 2005 American television episodes Battlestar Galactica (season 2) episodes fr:Saison 2 de Battlestar Galactica#Les Centurions de Caprica