Professor Robinson finds himself ensnared in a matter transfer emission ray, landing him in an alternate dimension where he encounters an evil doppelgänger of himself and Don. This bizarre realm, known as the anti-matter world, distorts reality in unsettling ways. The sinister version of John reappears, plotting to usurp the Robinson family's lives and claim John's identity. As tension mounts, Will and the Robot must devise a plan to thwart his ambitions. Can they successfully restore balance and return everything to its rightful state, or will chaos reign?
Show
Lost in Space
Episode
S03E15
Air Date
Dec 27, 1967
Season 3 Episodes
S03E01
Condemned of Space
S03E02
Visit to a Hostile Planet
S03E03
Kidnapped in Space
S03E04
Hunter's Moon
S03E05
The Space Primevals
S03E06
Space Destructors
S03E07
The Haunted Lighthouse
S03E08
Flight into the Future
S03E09
Collision of Planets
S03E10
Space Creature
S03E11
Deadliest of the Species
S03E12
A Day at the Zoo
S03E13
Two Weeks in Space
S03E14
Castles in Space
S03E15
The Anti-Matter Man
S03E16
Target: Earth
S03E17
Princess of Space
S03E18
Time Merchant
S03E19
The Promised Planet
S03E20
Fugitives in Space
S03E21
Space Beauty
S03E22
The Flaming Planet
S03E23
The Great Vegetable Rebellion
S03E24
Junkyard in Space