Lure of the Circus is a 1918 American adventure film serial directed by J. P. McGowan.

Tana, a voluptuous half-caste girl of the South Seas, falls in love with FBI agent Wally and wishes to marry him and leave the island. Wally, with his pal Jinx, is there to investigate rumored Japanese spy activity. He agrees to marry her if she will help him in his investigations. Through the discovery of a contraband radio set tuned to Japanese reception, Wally learns that the local Commandant is in league with the enemy and is planning an invasion of the island.

Two aspiring actresses encounter mishaps during a shoot.

A story of the Alaskan gold-rush days, filmed in Alaska, finds Bob Force (Buddy Roosevelt, as Kent Sanderson) saving the heroine, Sue McCraig (Eva Novak), and her holdings from the clutches of evil Dan Baird (Howard Webster.

Von Muller, a member of the fashionable Jockey Club, loses all his fortune, and is indebted on I.O.U. to Lang in a large sum, which he is unable to pay. Going to his room he contemplates suicide when his eye is arrested by a letter, which he opens and finds to be an invitation to a masquerade ball from Franz Oberman, a millionaire, and fellow club member. Von Muller resolves to attend. He dons the costume of a beggar. The ball is at its last ebb when a messenger hands him a note for Lang, reminding him the obligation falls due at midnight. He goes to the conservatory, and is about to end it all, but is intercepted by the host. Oberman tells him he has everything that wealth can give, but he, too, is unhappy. Taking Von Muller to his library. Oberman draws up an assignment of his entire wealth on condition that if after he has gone out into the world a poor man and does not find happiness they shall die together.

An eccentric millionaire hides $3 million of gold somewhere in the Rocky Mountains, luring thousands out on a wild treasure hunt in search of riches and redemption.

Charlotte Baker is drugged and taken to a brothel by Paul, her fiance, who in reality is a pimp. To find her, Charlotte's family contacts the celebrated detective Bob Macauley.

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Nellie is lured to the circus by Rudolf Ratbone.

A child flees his abusive father and takes refuge with a clown.