Supernatural (2005)

Dead in the Water - S1-E3

Revealing mistake: When Sam pulls Angela out of the bathtub and on to the floor, you can see the panty line from the nude colored panties she's wearing to keep the show PG13.

padfootrocksmysocks

Skin - S1-E6

Revealing mistake: Sam and Dean do a U-turn out of the garage at the start and leave skid marks on the road. However, there are already skid marks from previous take in the exact spot they turn. (00:04:10)

Ssiscool ★

Route 666 - S1-E13

Revealing mistake: During the love scene between Dean and Cassie, you can see the tape used on Cassie to keep the show PG-13. (00:23:15)

LorgSkyegon

Nightmare - S1-E14

Revealing mistake: When Max opens the bedroom door to confront his step-mother and Dean, using his telekinesis powers, you can see the equipment used to open the door, a rope pulling the door on the floor. (00:34:19)

Hell House - S1-E17

Revealing mistake: Dean gets his phone and snaps a picture of Sam when he's asleep. You see his phone take the picture but the screen is then white, showing he didn't really take anything.