There are certain typical TV episodes that every show within their respective genre (sometimes all genres) feels the need to have. What are some you just can not bother with, or even hate?

For example (and these aren't necessarily my own personal opinions):

Alternate timelines (https://tvtropes.org/pmwiki/pmwiki.php/Main/AlternateTimeline)

Clip shows (https://tvtropes.org/pmwiki/pmwiki.php/Main/ClipShow)/Flashback episodes

Doppelganger (https://tvtropes.org/pmwiki/pmwiki.php/Main/Doppelganger) episodes

Having to be and trying to be at two places at once (https://tvtropes.org/pmwiki/pmwiki.php/Main/TwoTimerDate)

Mistaken for cheating (https://tvtropes.org/pmwiki/pmwiki.php/Main/MistakenForCheating)

The misunderstanding (https://tvtropes.org/pmwiki/pmwiki.php/Main/MistakenForIndex)

Musical episodes (https://tvtropes.org/pmwiki/pmwiki.php/Main/MusicalEpisode)

Very special episodes (https://tvtropes.org/pmwiki/pmwiki.php/Main/VerySpecialEpisode)