In "Barney gets his man" episode 30 of season one where Andy and Barney are assisting state police on a man hunt for Eddie Brooke(Barney Phillips)Andy, having spotted Brooke in the loft of an old abandoned barn decides to station Barney in the barn so as to set up Barney as the hero that captures Brooke. And he leaves a walkie talkie with Barney. Seconds after leaving Barney talks to Andy on the radio even though Andy didn't have a radio when he left. Seconds after that Andy is seen looking through a hole in the barn wall and he has no walkie talkie. After brooke is captured Andy and the two state policeman,who by that time should have been a great distance away, rush in together and none of the three have a walkie talkie. The question...how was Barney going to communicate with them if there was only one radio and how did he talk to Andy?