Theory:SJA television discontinuity and plot holes/Goodbye, Sarah Jane Smith


 * When Luke and Rani are showing K9 the picture of Ruby and Mr. White, Rani gives her phone to Luke, who points it at the screen. Then the camera faces the computer, and Rani's hand can be seen holding the phone. Then the camera switches back to face Luke and Rani and Luke has the phone again. There would be no point in switching the phone from person to person, and they have no time ot do it anyway.