When Chuck (Michael McKean) arrives to testify, the clock displays 12:16 before being unhooked. 1216 is the address number of Mesa Verde Bank and Trust changed by Jimmy (Bob Odenkirk) to replace 1261. (Fifi (2016))
This is the first episode in the series in which Mike (Jonathan Banks) does not appear, making Jimmy (Bob Odenkirk) the only character to appear in all episodes of the series.
In the top 10 best TV episodes of 2017, Time ranked Chicanery in 8th place, stating that "Better Call Saul's particular gift for moral ambiguity hit a high point with this episode".
The meaning of Chicanery is tricking someone in order to achieve a legal (or financial, or political) purpose.
Jimmy (Bob Odenkirk) asks Chuck (Michael McKean) if he would have been embarrassed to tell Rebecca (Ann Cusack) if he had lung cancer instead of his electromagnetic hypersensitivity. It is likely that this is a reference to Walter White (Bryan Cranston) and his initial reluctance to tell Skyler (Anna Gunn) about his disease.