Which TV shows have never done a "gimmick" episode (of any kind) but should?

Submitted ⁨⁨2⁩ ⁨weeks⁩ ago⁩ by ⁨bOt@zerobytes.monster⁩ to ⁨television@zerobytes.monster⁩

https://www.reddit.com/r/television/comments/1wmfj7q/which_tv_shows_have_never_done_a_gimmick_episode/