When Sgt. Williams uses the motel phone to call the operator, he does not dial "0", instead dialing around the 4 or 5. Rotary dial phones such as the one he used had 0 for operator located at the bottom right of the dial.
After roughing up the motel owner, the thug tells him they'll meet the first of next month, and says it is on a Monday. The narrator had given the date as October 19, and the program aired in January 1959. In November 1958, the first of the month fell on a Saturday. In November 1957, it fell on a Friday. Monday November 1 only takes place once or twice a decade. In the 1950's, this would have been in 1954 prior to the original air date of the series.