A pub, bar or cafe that everyone in the series goes to and chats to others
Knocking on someone's front door and being let in without saying who you are (especially in these video doorbell times)
Walking into a house without ringing/being let in and overhearing vital information. In some cases walking back out without anyone knowing you were there
Never saying goodbye or goodnight after a call or visit. Brief visits that should have been phone calls or emails
Only ever having a bite from a breakfast, lunch or dinner spread then walking away
Switching the TV on just as important/relevant news is breaking
Heavy rain during romantic scenes - but the protagonists don't run for cover or reach for an umbrella
Cast members with ordinary jobs living in a spacious apartment or house in an expensive city
Court scenes that would never happen in real life (in the UK) e.g. loud objections, gavel banging, surprise witnesses, brand new evidence being admissible etc
Social services/child protection being very responsive and decisive (e.g. removing a child after a phone call) when in real life they take much longer to investigate and often end up closing the case