Just an Echo is a 1934 Paramount short starring Bing Crosby and directed by Arvid E. Gillstrom.
 This was the second of two short films Crosby made for Paramount in May / June 1933, the other being Please.
Dusty Ermine is a 1936 British crime film directed by Bernard Vorhaus and starring Anthony Bushell, Jane Baxter and Ronald Squire.
 In the United States it was released under the alternative title Hideout in the Alps.
 It was based on the play of the same title by Neil Grant.
Fisherman's Wharf is a 1939 American drama film directed by Bernard Vorhaus from a screenplay by Bernard Schubert, Ian McLellan Hunter, and H. Clyde Lewis.
 The film stars Bobby Breen, Leo Carillo, Lee Patrick, and Slicker, "the silly seal".
 Produced by Sol Lesser for RKO Radio Pictures, who also distributed the film, it was released on February 3, 1939.
Money Talks is a 1926 comedy film directed by Archie Mayo.
 The film stars Claire Windsor, Bert Roach, Owen Moore and Ned Sparks.
 It is written by Jessie Burns and Bernard Vorhaus, based on the story by Rupert Hughes.
 The film is considered partially lost.
Money for Speed is a 1933 British sports drama film directed by Bernard Vorhaus and starring John Loder, Ida Lupino, Cyril McLaglen and Moore Marriott.
 It is centered on the sport of speedway racing, which was at its peak of popularity at the time.
Bernard Vorhaus (December 25, 1904 – November 23, 2000) was an American film director born in New York City.
Cotton Queen, also known as Crying Out Loud, is a 1937 British comedy film directed by Bernard Vorhaus, and starring Stanley Holloway, Will Fyffe, and Mary Lawson.
Arvid E. Gillstrom (13 August 1889 – 21 May 1935), was a Swedish film director and screenwriter.
 He was born "Arvid Evald Gyllström" in Annedal, Gothenburg, Sweden and died in Hollywood, California.
Please is a 1933 short musical comedy film directed and produced by Arvid E. Gillstrom.
 It stars Bing Crosby as himself along with Vernon Dent and Mary Kornman.
The Courageous Dr. Christian is a 1940 American film directed by Bernard Vorhaus.

Question: What is common between Arvid E. Gillstrom a Swedish and  Bernard Vorhaus?
Answer: film director