Hammer had struck gold revisiting ancient civilization in One Million Years B.C. (1966) and with its adaptation of Dennis Wheatley’s The Devil Rides Out (1967). The Lost Continent was another Wheatley number (source novel Uncharted Seas) mixing dangerous voyage, hints of the legendary Atlantis, and monsters. While the first half could have been marketed as The Wages of Fear At Sea the second half would come under the heading “The Greatest Oddball Film Ever Made.”
It boasts one of the most intriguing setting-the-scene openings not just of a Hammer picture but of any film – a camera pans along a steamship on whose deck are: people dressed in furs, others in modern clothing and – Conquistadors. Attention is focused on a coffin. How and why they got there is told in flashback. A first half of taut drama, mutiny, sharks, a ferocious octopus, and lost-at-sea a thousand miles from land segues into sci-fi with carnivorous weeds, monsters, and a weird, weird world.

It’s hard to know what’s worse, Captain Lansen (Eric Porter) with a cargo of toxic chemicals made combustible when touched by water or the equally combustible passengers all with murky pasts, so determined to escape their previous lives that they refuse to turn back in the face of a hurricane. Heading the Dodgy Half-Dozen is dictator’s mistress Eva (Hildegarde Knef) with two million dollars in stolen securities and bonds. Dr Webster (Nigel Stock), a back-street abortionist, is at odds with daughter Unity (Suzanna Leigh), who has cornered the market in backless dresses. Harry (Tony Beckley) (The Penthouse, 1967) plays a conman while Ricaldi (Ben Carruthers) is trying to recover the pilfered bonds.
But the arrival of cleavage queen Sarah (Dana Gillespie) as an escapee from the weird world signals a shift to Planet Oddball. The only way to navigate the weeds trapping the ship is with a primitive version of snowshoes with balloons attached to the shoulders. Soon they are trapped in the past, not as prehistoric as One Million Years BC (1966), just a few centuries back to the Spanish Conquistador era. The film steals the idea from the Raquel Welch picture of giant creatures locked in battle but without going to the necessity of hiring Ray Harryhausen.

You couldn’t legislate for the movie’s logic and you shouldn’t even try, just go with the weird flow. It’s on safe enough territory until like The Hangover (20090 it has to explain the bizarre opening sequence. If ever a film has bitten off more than the special effects can chew, it’s this, but it’s still fun watching it try.
The casting relied heavily on actors best known from television or rising stars. Eric Porter was straight from BBC television mini-series mega-hit The Forsyte Saga (1967). Nigel Stock essayed Dr Watson in the BBC Sherlock Holmes series (1964-1968). Falling into the emerging-star category were: Tony Beckley (The Penthouse, 1967), Suzanna Leigh (The Pleasure Girls, 1965) Neil McCallum (Catacombs / The Woman Who Wouldn’t Die, 1965), and Dana Gillespie (Secrets of a Windmill Girl, 1966). Hildegarde Knef (Mozambique, 1964) was just about the most experienced.
In this kind of picture, without being sexist about it, if a woman is required to do more than just scream, it often indicates she has the better part. And so it is here. Leigh and Knef hog the dramatic highlights while Gillespie, courtesy of her outfit and footwear, can’t help but steal the show.
On board ship, director Michael Carreras, fresh from Prehistoric Women (1967), does well, the characters are all solidly presented with decent back stories, but once he enters weird world budget deficiencies sabotage the picture. Even so, it’s worth a look just to see what you’re missing. If you’re looking for a genuine freak show, this ticks the boxes.

Love this film; my favourite bit is when the Captain tells the passengers ‘I’m not going to try and minimise the situation’ in a vert British way as they contemplate using balloons to traverse the deadly weeds….
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