On The Buses S03 E04 Brew it Yourself

Stan decides to make beer at home as a way of cutting expenses. However, the beer turns out stronger than usual and Stan makes the mistake of drinking it before his shift. He arrives drunk at the depot and tries to force himself on a clippie, which attracts Blakey's attention. Blakey orders Stan to take a breathalyser test, informing him he will be sacked if the test finds him drunk. Jack makes Stan eat mashed potatoes to try and remove the beer from his breath. As a final effort, he makes Stan inhale smoke to sabotage the test. Stan manages to fool the breathalyser and keeps his job.