realistically impossible; according to the filmbooks, however, Gainax could have ignored the realism of the clash in an attempt to seek the viewers' catharsis. According to the original script, three battleships should have been used for the fight, but only two were used in the final version. "Asuka Strikes!" also depicts existing military vehicles, such as the Sukhoi Su-33, the Yakovlev Yak-38, the Northrop Grumman EA-6B Prowler, the Northrop Grumman E-2 Hawkeye, and the Mil Mi-2, along with a Mil MI-55D, a helicopter that does not exist in the real world designed for the episode. Production staff inserted some German technical jargon terms to use during the operations, such as bewegung, nerven anschlussess, anslösung, rinkskleidung . Yuko Miyamura, Asuka's voice actress, took lessons at a language school to practice before finding out it was technical jargon; when she asked her native-German-speaking teacher for advice, he told her he did not understand it. Tomomichi Nishimura and Jin Yamanoi served as voice actors for the captain and vice-captain of the Over The Rainbow. A background radio program was also written for the episode; voice actors Nishimura, Yuriko Yamaguchi, and Kotono Mitsuishi played the characters on the program, while singer Aya sang "Fly Me To The Moon" in bossa nova style for the closing theme of the installment. References and themes The Nimitz-class aircraft carrier USS Harry S. Truman, renamed Over The Rainbow in homage to The Wizard of Oz song, appears in the episode, as do the Kiev-class Soviet aircraft carrier Novorossiysk, the Russian battlecruiser Kirov, the Russian destroyer Udaloy, the JS Kongō, Iowa-class battleships USS Illinois (BB-65), the USS Kentucky (BB-66), Russian aircraft carrier Admiral Kuznetsov, Arleigh Burke-class guided missile destroyer USS Ramage, USS Ticonderoga (CG-47), Tachikaze, Hatakaze, Asagiri-class destroyers and Chikugo-class destroyer escorts. Moreover, the ships' code names for internal use in the fleet — including Othello, Cymbeline, Titus Andronicus and The Tempest — are derived from titles of plays by William Shakespeare. Kingston valves are mentioned during the battle against Gaghiel; these are special valves that are used to fill ships' hulls with water and are located at the stern of some old ships. Gainax previously mentioned the same valves in the original video animation GunBuster. At the end of the episode, Gendo describes Adam as "the first human being" in homage to a similar scene in Nadia: The Secret of Blue Water. For Dennis Redmond, writer of The