The Marshalls and Pakuni must work together when a prolonged pursuit leaves Will, Holly, and Cha-Ka trapped between the Land's ruling tyrannosaur and its arch-enemy allosaur
After entering one of the mysterious pylons, Will and Holly find that their actions have messed with the weather and created a terrible storm that is dealt with by three mysterious flying objects.
Cha-Ka is invited to dinner by the Marshalls, but when Holly dabs on some perfume she has (leading Rick to mutter, "Our little girl is growing up to be a lady") it causes the other Pakuni to capture Holly - and draws out the land's ruling tyrannosaur.
When Rick is electrocuted by crystals, Will must convince Enik to save his life but finds that his time doorway has settled on Earth leaving him with a bitter choice
12
The Possession
November 23, 1974
David Gerrold
Dennis Steinmetz
Cha-Ka and Holly come under the control of a malevolent being that is seeking more power for one of the pylons.
13
Follow That Dinosaur
November 30, 1974
Dick Morgan
Dennis Steinmetz
Grumpy's attraction to ground-hugging ferns Holly has nicknamed "dinosaur nip" causes the Marshall children to dump it over a cliff, where they discover a mysterious diary that holds clues to a possible escape from the Land.
Rick and Will follow the Pakuni to a special pylon that seems to be linked to Earth. Holly enters the pylon searching for her family and discovers that the pylon is a portal rapidly shifting between times and worlds.
The Sleestak tamper with a pylon in order to create eternal darkness, forcing Rick and Enik to consult the Library of Skulls in order to find a way to set things right.
A mammoth earthquake shatters the land, opens a temporal pathway in which Rick Marshall falls and thus returns home, and brings to the land Will and Holly's uncle, Jack
After Holly falls ill, Jack bargains with the barbarian Malak (Richard Kiel) for the medicine that was stolen from them.
33
The Orb
September 25, 1976
Jon Kubichan
Rick Bennewitz
After a new pylon turns Will invisible, he is persuaded by a captured Enik to use this ability to retrieve a sacred orb and exchange it with the Sleestak for the Altrusian's freedom.
34
Repairman
October 2, 1976
Jon Kubichan
Joe Scanlan
The Sleestak remove a vital crystal from the sun pylon and a strange man (Laurie Main) appears and convinces the Marshalls to help him get it back.
A runaway river carries Holly to a strange garden adorned with numerous statues and inhabited by a peculiar woman (Marian Thompson) who won't let her leave.
36
Cornered
October 16, 1976
Sam Roeca
Rick Bennewitz
Jack, Holly and Cha-Ka work to rid the valley of a fire breathing dimetrodon while Will recovers from the creature's venom.
The lone captain of a sailing ship (Rex Holman) offers the Marshalls a way home but harbors a terrible secret.
38
Hot-Air Artist
October 30, 1976
Jon Kubichan
Rick Bennewitz
Showman/explorer "Colonel" Roscoe T Post (David Healy) arrives in a balloon from 1920. While the Marshalls work to repair his craft the Colonel has designs on Cha-Ka.
39
Abominable Snowman
November 6, 1976
Sam Roeca
Joe Scanlan
The Marshalls rescue a unicorn given to Holly as a birthday gift from the clutches of the Yeti-like Tapa. (John Locke).
40
Timestop
November 13, 1976
Tom Swale
Joe Scanlan
The Marshalls find a temporal key that Enik believes will take him home, but the Marshalls use it instead to save one of their own.
Cha-Ka suddenly becomes hostile towards his friends after being bitten by a powerful beetle, steals the Skull of Wisdom, and frames the Marshalls for the theft.
43
Medicine Man
December 4, 1976
Jon Kubichan
Joe Scanlan
The Marshalls convince Lone Wolf (Ned Romero) of the Nez Perce tribe and Captain Diggs (Gregory Walcott) of the US Cavalry that the two must learn to work together if they hope to survive and possibly return to 1877. Although this was the last episode aired, it was not an official one, and therefore Will and Holly Marshall never got to escape from the Land of the Lost, although an alternate version of them and their father did return to Earth in the final episode of Season One. The series finale.