This Is Your FBI was a radio crime drama which aired on ABC from April 
6, 1945 to January 30, 1953 for a total of 409 shows. FBI chief J. Edgar
Hoover gave it his endorsement, calling it "the finest dramatic program
on the air". Stacy Harris (shown below) played the lead role of fictional
Special Agent Jim Taylor. Others in the cast included William Conrad.

Stacy Harris

William Conrad

Little orphan Annie debuted on WGN radio in Chicago and eventually aired
coast to coast on NBC’s Blue Network until 1942. For most of the shows run, 
Chicago actress Shirley Bell (below) played Annie. The initial sponsor of  
the show was chocolate flavored Ovaltine. Little Orphan Annie was one 
of the first comic strips adapted to radio. It was inducted into the Radio
Hall of Fame in 1990.

Shirley Bell played Annie 

The announcer for show was Pierre Andre

The Little Orphan Annie secret decoder ring 

Lowell Jackson Thomas (April 6, 1892 – August 29, 1981)
has two stars on the Hollywood Walk of Fame and was
inducted into the Radio Hall of Fame in 1989. 

The Martin & Lewis Show went on the air, while still searching for a sponsor.Their first 
guest that Sunday night was Bob Hope.The NBC radio shows consisted of an opening song and dance by Dean Martin, followed by some verbal slapstick, a guest spot by a well-known Hollywood star,a lot of Jerry Lewis high jinx, and then a closing number by Martin. The radio series ran till 1952.

Bob Hope

The Big Story was a radio crime show on NBC which dramatized the true stories of real-life newspaper reporters. The only continuing character was the narrator, Bob Sloane.The first sponsor of the show was Pall Mall Cigarettes and Lucky Strike Cigarettes sponsored the last two years. The series aired until March 23, 1955 and was top rated, rivaling Bing Crosby’s Philco Radio Time.