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Whilst he is exploring an asteroid Koenig is taken over by an alien race known as the Kalthon, who replace him with an exact double. In consequence every action ordered by the fake Koenig is solely for the benefit of the Kalthon and to the detriment of the welfare of the Alphans. Helena realizes that something is wrong when 'Koenig' is cold to the touch and needs to convince the other crew members.
Ngày phát sóng đầu tiên : Sep 04, 1975
Ngày phát sóng cuối cùng : Nov 12, 1977
Tập phim : 48 Tập phim
Mùa : 2 Mùa
Thời gian chạy: 52:50 phút
Studio: ITV1
Quốc gia: Italy, United Kingdom
