1. Staffel (1967-1968)
101 Die Entdeckung (Beachhead)
102 (The Experiment)
103 (The Mutation)
104 (The Leeches)
105 (Genesis)
106 (Viktor)
107 Die Insekten (Nightmare)
108 (Doomsday Minus One)
109 Herkunft: Unbekannt (Quantity: Unknown)
110 Reise nach Utopia (The Innocent)
111 Der Charterpilot (The Ivy Curtain)
112 (The Betrayed)
113 (Storm)
114 (Panic)
115 Der Astronaut (Moonshot)
116 Tödliche Kristalle (Wall of Crystal)
117 Die Geheimakte (The Condemned)
118 Alarmstufe I (Condition: Red)
119 Das Raumschiff (The Saucer)
120 (The Watchers)
121 (Valley of the Shadow)
122 (The Enemy)
123 Der Mordprozess (The Trial)
124 (The Spores)
125 (Dark Outpost)
126 (Summit Meeting, Part 1)
127 (Summit Meeting, Part 2)
128 (The Prophet)
129 (Labyrinth)
130 (The Captive)
131 Die Helfer (The Believers)
132 (The Ransom)
133 Der Zeitungskönig (Task Force)
134 Die Marionetten (The Possessed)
135 Der Gegenschlag (Counterattack)
136 Die Traummaschine (The Pit)
137 Die Gangster (The Organisation)
138 (The Peacemaker)
139 Die Galgenfrist (The Vise)
140 (The Miracle)
141 Die Rebellen (The Life Seekers)
142 Die Verfolgten (The Pursued)
143 (Inquisition)