Character mistake: At the Life Guard Trials, Kelly is the first Angel to arrive. She finishes 20th. Then, four other competitors arrive (21st / 22nd / 23rd / 24th). Then, Kris arrives. The judge says to her "You're 23." (00:11:15)
Character mistake: When the aliens fire and knock out the soldiers, the one on the left extends his right hand to ensure a safe fall despite being unconscious.
A Frightened Hound Meets Demons Underground - S1-E14
Character mistake: Velma mentions Seattle burned down in 1890. The fire went from June 6-June 7 1889.
The Man Who Wouldn't Tell - S2-E20
Character mistake: When Ted escorts Diana away from the elevator, he stares at the camera.