America Calling (aired on NBC & CBS)
Febuary 8, 1941 (90 min.)

Cavalcade of America  (aired on NBC)
"The Sailor Takes a Wife" w/ O. Munson. January 31, 1944

Federal Theatre Special  (aired on NBC)
June 26, 1939

Guest Star Syndicated  (aired on CBS)
June 22, 1952 (15 min.)

Gulf Screen Guild Show
w/ Tyrone Power, Rosalind Russell. June 4, 1939

Hollywood Calling
(series #12) (George Fisher) w/ E. Lanchester, B. Hale, B. Crabbe. Synd. c.1950

Hollywood Hotel  (aired on CBS, 1 hour)
"Imitation of Life" preview w/ Claudette Colbert, W. William, El Brendel, Louella Parsons. October 4, 1934
"One in a Million" preview w/ F. Langford, Sonja Henie, Ritz Brothers, A. Menjou, A. Judge. December 18, 1936

Hollywood Startime  (aired on ABC)
"Murder, My Sweet" w/ Mary Astor, M. Mazurki. June 6, 1946

Lady Esther Screen Guild Players
"Hello, Frisco, Hello" w/ Ginny Simms, Jackie Oakie. April 3, 1944

Lux Radio Theatre  (aired on CBS, 1 hour each)
"Gold Diggers" w/ Joan Blondell. December 21, 1936

"Model Wife" w/ Joan Blondell May 12, 1941
Download this episode from Archive.org here.

"My Gal Sal" w/ Mary Martin January 18, 1943
Download this episode from Archive.org here.

"Springtime in the Rockies" w/ Betty Grable, Carmen Miranda, E. Barrier. May 22, 1944
Download this episode from Archive.org here.

"Christmas in July" w/ Linda Darnell, R. Walburn. June 26, 1944

"It Started With Eve" w/ Charles Laughton, S. Foster. November 20, 1944
Download this episode from Archive.org here.

"Murder, My Sweet" w/ C. Trevor, M. Mazurki. June 11, 1945
Download this episode from Archive.org here.

"Johnny O' Clock" May 12, 1947
Download this episode from Archive.org here.

"Pitfall" November 8, 1948.

"To the Ends of the Earth" May 23, 1949
Download this episode from Archive.org here.

"Mrs. Mike" April 24, 1950

"The Reformer and the Redhead" June 25, 1951

"Island in the Sky" January 11, 1955

"Little Boy Lost" May 17, 1955

Dick Powell also had his own radio series Richard Diamond: Private Dectective, this is by far just a slice of Powell's radio appearances.

Link to Richard Diamond entries on Arhive.org here.
Link to Rogue's Gallery entries on Archive.org here.