I remember one where Terry Scott and June Whitfield, playing a married couple, are in a solicitor's office, and June says, about a court hearing,  something like

"It's a good job he can't represent himself"

and the solicitor says

"Oh but he can"

And Terry's face lights up.

In a later scene he is in court, dressed for the part in a gown and possibly a wig, and after a while the judge, discovering he is not a solicitor, asks where he got them and Terry replies "From a theatrical costumier"

I seem to remember he won the case as June had been in his car and accused of running into a council dust cart.

The driver of the dust cart said when questioned something like "She was parked right behind me" and Terry calls out "Parked".

I don't know why Terry was in court representing himself, possibly because he was the registered keeper of the car, but that is just me speculating on that.