Frank Cotsen was a solicitor who represented Jerry Booth when he appeared in the Magistrates' Court on a charge of assaulting Jim Stoker. In this instance, Jerry was found guilty and given a conditional discharge for twelve months. In between the gaps in proceedings, Cotsen and his opposing number, Mr Sanderson, were on the best of terms and chatted about mutual friends while an aghast Jerry watched on. The character's first name was given in dialogue in his second appearance. David Garth also played a barrister, possibly the same character, in Episode 738.