It has a similar plot (although the ending of the original doesn't have the characters die from an explosion; instead the cat dies from getting shot, and returns as nine singing angels), but the Elmer and Sylvester characters in Notes to You were taken by Porky Pig and an unnamed alley cat (the latter bearing a striking resemblance to the cat from Bob Clampett's The Hep Cat).
The song playing on the opening titles is "You Never Know Where You're Goin' Till You Get There", which had been sung by Sylvester a few weeks earlier in Back Alley Oproar.
Back to the Future | Back to the Bible | Tin Pan Alley | The Empire Strikes Back | Taking Back Sunday | Alley Theatre | Back Bay | Welcome Back, Kotter | Thunder Alley | Looney Tunes: Back in Action | back | I Want You Back | Sister Act 2: Back in the Habit | Look Back in Anger | Idol Gives Back | Get Back | Carry Me Back to Old Virginny | Back to You | Back Alley Oproar | We're Back! A Dinosaur's Story (film) | We're Back! A Dinosaur's Story | Take Me Back to Dear Old Blighty | Rewi Alley | No Way Back | My Boyfriend's Back (film) | My Boyfriend's Back | Jay and Silent Bob Strike Back | Human back | Back to the Future Part II | Back to School |