Revealing mistake: After Krystal goes to the bathroom, Sarah's phone is not in call mode.
Revealing mistake: Not long into Sarah's phone call to Rachel telling her P.T. Westmorland's real age/name, Sarah's phone is not actually in call mode.
Orphan Black (2013)
2 revealing mistakes - chronological order
Starring: Tatiana Maslany, Maria Doyle Kennedy, Jordan Gavaris, Kristian Bruun
Continuity mistake: When Art kills Simon Frontenac, the barrel of his handgun is pulled back, indicating that the magazine is empty. When he checks Frontenac's pulse, the barrel is pulled forward again.