- Country: USA
- Genres: Comedy
- Release: 1929-10-12
- Director: Clyde Bruckman
- Writers: Paul Gerard Smith , Felix Adler , Lex Neal , Clyde Bruckman
- Language: English | Cantonese | German
- Stars: Harold Lloyd , Barbara Kent , Noah Young , Charles Middleton , Will Walling , Grady Sutton , Brooks Benedict , Eddy Chandler , Rae Daggett , Douglas Haig
- Runtime: 113 min
- Awards: N/A
- AKA: Achtung, Harold, Achtung! (Austria) , Welcome Danger (United States of America) , Welcome Danger (United Kingdom) , Harold Encravado (Portugal, Portuguese Republic) , Fingeraftrykket (Denmark) , Τι φαινόμενον! (Greece) , Quel phénomène! (France, French Republic) , Täällä ei pelätä (Finland) , Evviva il pericolo! (Italy) , Kiken dai kangei (Japan) , Evel Allah (Turkey) , Haroldo Encrencado (Brazil) , Welcome Danger (India) , 危険大歓迎 (Japan) , ¡Qué fenómeno! (Spain) , Welcome Danger , Ingen rädder här! (Sweden) , Добро пожаловать, опасность , Harold, der Drachentöter (Germany) , Witaj niebezpieczeństwo (Poland) , Welcome Danger (Canada) , Der Drachentöter , Viva el peligro! (Argentina)
- Plot: Harold Bledsoe, a botany student, is called back home to San Francisco, where his late father had been police chief, to help investigate a crime wave in Chinatown.
- IMDB:tt0020572
Welcome Danger Cast · · · ALL
Clyde Bruckman
Director
Harold Lloyd
Harold Bledsoe
Barbara Kent
Billie Lee
Noah Young
Patrick Clancy SFPD
Charles Middleton
John Thorne / The Dragon
Will Walling
Captain Walton, SFPD 3rd Div.
Grady Sutton
Man at Party (silent version) (scenes deleted)
Brooks Benedict
Handcuffed Prisoner at Police Station (uncredited)
Eddy Chandler
Cop (uncredited)
Rae Daggett
Woman Sitting in Police Station (uncredited)
Douglas Haig
Buddy Lee (uncredited)
Edgar Kennedy
SFPD Desk Sergeant (uncredited)
Tetsu Komai
Florist Henchman (uncredited)
James B. Leong
(1889–1967)
Florist Henchman / High Priest (uncredited)
Jim Mason
Barry Steele / Dick the Dude (uncredited)
Nelson McDowell
1st Train Passenger (uncredited)
James Wang
Dr. Chang Gow (uncredited)
Blue Washington
Thorne's Henchman (uncredited)
Leo Willis
Cop (uncredited)