Spookiest Twilight Zone for me was where a U-boat kapitan is a passenger on the Queen of Glasgow and doesn’t know how he got there. Then a U-boat appears and opens fire and all the passengers are killed, then he finds himself in his U-boat preparing to attack. Kind of like Groundhog Day with the German doomed to repeat the cycle for eternity.
My favorite is “A Piano in the House” where a player piano casts a spell on anyone nearby and makes them reveal their true selves.
My favorite episode is “The Hunt”, for obvious reasons.
Most ironic show: bespeckled man who never has enough time to relax and read as much as possible. Until nuclear bomb goes off, he survives, and stumbles onto the big, beautiful library.