Although OTRCAT.com does not have recordings of every series listed below, the following is
quick reference guide to old time radio show series, theme music title, and composer (when available).

• R.K.O. Radio Hour, The - "Voice of R.K.O., The" - Tom Kennedy
• R.K.O. Radio Theater, The [with host William Hanley] - "Voice of R.K.O., The" - Tom Kennedy
• Radio City Playhouse - "Shangri-La" - Robert Maxwell (m); Matty Malneck (m); Carl Sigman (w)
• Radio Hall of Fame, The - " World Outside, The (Theme from "The Warsaw Concerto") - Richard Addinsell
• Radio Readers Digest - "Radio Readers Digest Theme" - Nathan Lang Van Cleave
• Railroad Hour, The - "I've Been Working On The Railroad [aka: The Levee Song]" - Traditional U. S. Folk Son
• Ray Anthony [big band shows] - "Man With The Horn, The (1946)" - Eddie DeLange; Jack Jenney; Bonnie Lake
• Ray Bloch Music Party - "Ray Bloch Music Party Theme" - Raymond A. ["Ray"] Bloch
• Ray Bloch's Varieties - "Music In My Fingers" - Richard Myers (m); Edward Heyman (w)
• Ray Bolger Show, The - "Once In Love With Amy" - Frank Loesser"
• Ray Kinney [big band shows] - "Across The Sea (1919)" - Ernest K. Kaai; Johnny Noble; Ray Kinney
• Ray McKinley [orchestra shows] - "Howdy, Friends" - Ray McKinley
• Ray Noble [orchestra shows] -
  1. "Good Night, Sweetheart" - Ray Noble; Jimmy Campbell; Reg Connelly
  2. "Very Thought Of You, The" - Ray Noble
• Raymond Scott [orchestra shows]
  1. "Pretty Little Petticoat" - Raymond Scott (professional name of Harry Warnow); Jack Lawrence
  2. "Toy Trumpet, The" - Raymond Scott (professional name of Harry Warnow); Lew Pollack; Sidney D. Mitchell
• Real Silk Program, The - "Spectator March (from "Real Silk" Radio Program) - Harry Sosnik
• Red Nichols [big band shows] - "Wailing To The Four Winds" - Loring ["Red"] Nichols
• Red Norvo [big band shows] - "Mr. and Mrs. Swing" - Red Norvo
• Red Ryder - "Streets of Laredo, The [aka: The Dying Cowboy]" - Traditional U.S. Western Song
• Red Skelton Show, The
  1. Open Theme 1, circa 1941: "Jersey Jive, The" - Ozzie Nelson
  2. Close Theme 2, circa 1941: "Green Eyes (Aquellos Ojos Verdes)" - Nilo Menendez (m)
  3. circa 1942: "Great Day [aka: It's a Great Day...]" - Vincent Youmans; William Rose; Edward Eliscu
  4. from 1943: "Holiday For Strings" - David D. Rose
• Richard Diamond, Private Detective - "Leave It To Love" - Henry (professional name of Henry Russell Olson Russell; By Dunham
• Richard Himber [orchestra shows]
  1. "Am I To Blame?" (1930) - Victor Young (m); M. Neumann (m); Gus Kahn (w); Richard Himber (w)
  2. "It Isn't Fair" - Richard Himber; Frank Warshauer; Sylvester Sprigato
• Right To Happiness, The - "Song of the Soul" [incidental music for the 1909 drama "The Climax"] - Joseph Carl Breil (m); Edward Locke (w)
• Rin Tin Tin, The Adventures of - "Rin Tin Tin, The Adventures of" - Henry ["Hank"] Sylvern
• Riverside Hour, The [Montgomery Ward's Riverside Hour] - "Spirit Of Progress March" (1928) - J. Oliver Riehl
• Road of Life, The - "Andante Cantabile, First Movement Theme from the "Pathetique" Symphony No. 6 in B minor (Opus 74)" [popular title: "The Story of a Starry Night"] - Piotr Ilyich ["Peter"] Tchaikovsky; Joseph Carl Breil (adapter/arranger)
• Romance of Helen Trent, The - "Songs Of Affection" [adapted from the "Sarabande" from Handel's first opera "Almira" (1705); melody also used in the aria "Lascia Ch'io Pianga" (Let Me Cry) from his opera "Rinaldo" (1711)] - George F. Handel (m); Caroline Norton (adapter)
  
• Rosa Rio Rhythms - "Sunrise Serenade" - Frankie Carle (m); Jack Lawrence (w)
  
• Rosemary - "Rosemary Love Theme, The" - Paul Taubman
  
• Roy Rogers Show
  1. The - Post Cereals Sponsorship: Open Theme, before 1953: "Double-R-Bar, The [aka: It's Roundup Time on the Double-R-Bar] " - Dale Evans
     
  2. Quaker Oats Sponsorship:
     1. Open Theme, before 1953: "Smiles Are Made Out Of Sunshine" (1943) - Ray Gilbert
        
     2. Close Theme, before 1953; "Main & End Theme from 1953: Happy Trails" - Dale Evans
        
• Rudy Vallee
  1. "My Time Is Your Time" (1924) - Leo Dance (m); Eric Little (w)
  2. "On The Air" (1932) - Jimmy Campbell; Reg. Connelly; Carroll Gibbons
• Rubinoff Orchestra, The -
  1. "Give Me A Moment Please - Richard A. Whiting; Leo Robin; W. Franke Harling
  2. "Fascination Waltz" - Al Lewis; Dave Rubinoff
• Russ Morgan [orchestra shows] - "Does Your Heart Beat For Me?" - Russ Morgan