| Reynerson helps Tony to escape the Alamo, resulting in the fall and serious injury of Colonel | When the series was abruptly cancelled in the summer of 1967 by ABC, they had not filmed an episode in which Tony and Doug are safely returned to the Time Tunnel complex |
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| As Jerry is led away from the Tunnel, he suffers cardiac arrest due to shock, and is saved by the resourcefulness of Ann, who uses the severed power cords as a makeshift to revive him | The author was , who had previously written a novel of the same name in 1964, completely unrelated to the television series |
Karnutu, the chief guide, believes Doug and Tony are devils, who are causing the eruption, and he tries to sacrifice them to the fires to stop the eruption.
9| Tony and Doug's added weight 335 pounds makes it impossible for the spacecraft to reach escape velocity in order to escape the earth's gravitational pull | Tony succeeds in getting the sheriff played by to come to the mine to help, and when a partial cave-in is caused by the suicidal mine office clerk Henderson played by , the sheriff succeeds in saving Tony |
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| פרק הבכורה ששודר בארצות הברית ב נקרא "פגישה עם האתמול" "Rendezvous with Yesterday" , שבו טוני נוחת ממנהרת הזמן אל סיפון ה ומנסה להציל אותה מהטביעה הצפויה | לפעמים נוצרים סיבוכים בעלילה כאשר אנשים אחרים מגיעים למנהרת הזמן, למשל בת-דודה של שרון שנכנסת למנהרה או ילד שקרא את הספר מנהרת-הזמן |
However, the time disturbances cause the cave to collapse onto the greedy captain.
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