Laughton clearly stole the show
When I first saw this, it was to see Ty Power in his last completed film but Laughton clearly overshadows him, both in the courtroom and with the bad heart (particularly when he calls Mrs Vole a liar---whoa did he let that point out!)
Like in "The Sun Also Rises" three principals were gone within a little more than a year or less. After Ty died, Philip Tonge died two months later (he appeared in episode 4 of Perry Mason in October 1957) & Una O'Connor but she was in her 80s. Charles Laughton died 4 years later and Henry Daniell the following year. As my late parents would say, time is precious so make the best of it.