Aside from I Spy, Sheldon Leonard didn't have much luck creating hit series at NBC. All of his sitcoms ended up lasting a season or less.
His last American-produced entry for NBC, My World.....And Welcome To It, was given the lead-off spot in NBC's Monday lineup in 1969, leading into the 2nd year series, Rowan & Martin's Laugh-In. Problem was, My World was slotted opposite the first half of Gunsmoke. Enough said.
William Windom (ex-The Farmer's Daughter) top-lined as John Monroe, who had appeared in a number of books by James Thurber, upon whom the show was based. DePatie-Freleng provided the animation for the opening sequences and some bumpers. Monroe was a cartoonist prone to Walter Mitty-like fantasies, Mitty being one of Thurber's best known creations, which hampered Monroe's personal & professional lives. Joan Hotchkiss & Lisa Gerritsen co-starred. Humorist Henry Morgan (ex-I've Got a Secret) appeared periodically as a friend of Monroe's, who was based on another humorist, Robert Benchley.
Never saw the show, so we'll forego the rating again. Here, though, is the series opener.
Leonard would land one last series at NBC, the British-produced From a Bird's Eye View, the first of his two collaborations with England's ITC, the next season, and that would be it.