Нил Деграсс ТайсонSelf - Host
Ann Druyan
Карл СаганSelf (voice) (archive footage)
Сет МакФарлейнSherwood Rowland (voice)
Sasha SaganRachel Molly Gruber
Stoney EmshwillerGuard (voice)
Андре СоглиуззоChristopher Wren (voice)
Christopher EmersonAcolyte (voice)
Пётр МихаэльLab Assistant (voice)
Енн РейтелHenry Norris Russell (voice)
Keythe Farley(voice)
Патрик СтюартWilliam Herschel (voice)
Elizardo TorrezYoung Carl Sagan
Trang Vo(voice)
John Steven RochaBellaramine (voice)
Paul TelferAngry Scholar #2 (voice)
Jonathan Morgan HeitJohn Herschel (voice)
Кэри ЭлвисEdmond Halley / Robert Hooke (voice)
Tom KonkleSamuel Pepys (voice)
Александр СиддигIsaac Newton (voice)
Альфред МолинаIbn al-Haytham (voice)
Ричард ГирClair Patterson (voice)
Marc WordenHarrison Brown (voice)
Кирстен ДанстCecilia Payne (voice)
Марли МэтлинAnnie Jump Cannon (voice)
Peggy Jo JacobsMargaret Harwood (voice)
Аманда СайфредMarie Tharp (voice)
Кристиан АманпурEnheduanna (voice)
Майкл ХохолJan Oort
Oliver VaquerJoseph von Fraunhofer (voice)
Фред ТаташорDemocritus (voice)
Larry Cedar
Nick Jameson
Michael McConnohie
Masasa Moyo
Martin JarvisHumphry Davy (voice)
Noah Langford(voice)
Фэй Мастерсон(voice)
Heiko ObermöllerEinstein's Father (voice)
Джулиан ОвенденMichael Faraday (voice)
Glenn SteinbaumBruce Heezen (voice)
Уильям Салиерс(voice)
Paul SorvinoAugustin Mouchot (voice)
Eliza Schneider(voice)
Frank BaxterSelf (archive footage)
Джон Фицджералд КеннедиSelf (voice) (archive footage)
Harssh A. SinghAshoka (voice)
Nick Sagan
Clinnette Minnis
Shereen BallesFemale Voyager (voice)
Kapeneta Te'o-TafitiMale Voyager (voice)
Carol Bach RitaCaroline Herschel (voice)
Вигго МортенсенNikolai Vavilov (voice)
Ken Lally(voice)
Phil Crowley(voice)
Юрий Ловенталь(voice)
Edita Brychta(voice)
Christopher Lee Parson(voice)
Andrew Pifko(voice)
Брендан Брэдли(voice)
