20) The Office US – “Casino Night” (2006)

In the season 2 finale of The Office, "Casino Night," the cliffhanger is Jim Halpert's unspoken feelings for Pam Beesly. The episode ends with Jim's confession of love to an engaged Pam, so when the quietly tense relationship between Jim and Pam is combined, this makes one of the most heartfelt cliffhangers in TV history. This open moment played out over several seasons, with viewers eager to see Jim and Pam finally get together, thus making this cliffhanger an iconic moment in the series' overall legacy.
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Edited by Mudeet Arora