Mr. Sloan tells Henry to "bring 'em back alive", and to hire "Frank Buck" if necessary in relation to finding Gus before the mob gets to him. Sloan is referring to the real Frank Buck who was well-known at the time as a big-game hunter and a supplier of animals to circuses and zoos. The line "bring 'em back alive" was the title of his first best-selling book about his exploits.
According to a contemporary article in The Hollywood Reporter, MGM originally cast James Stewart as the lead and tried to borrow Jean Arthur from Columbia as his co-star.
The $50,000 in the insurance policy would equate to over $986,000 in 2021.
This film's television premiere took place in Los Angeles Wednesday 12 June 1957 on KTTV (Channel 11); it first aired in Chicago 11 July 1957 on WBBM (Channel 2), in Miami 23 July 1957 on WCKT (Channel 7), in Omaha 21 August 1957 on WOW (Channel 6), in Tucson 24 August 1957 on KVOA (Channel 4), in Altoona PA 4 September 1957 on WFBG (Channel 10), in Honolulu 18 October 1957 on KHVH (Channel 13), in Philadelphia 22 October 1957 on WFIL (Channel 6), in Fresno CA 25 November 1957 on KMJ (Channel 24), in Seattle 28 June 1958 on KING (Channel 5), and in New York City 29 April 1963 on WCBS (Channel 2).