The day before the broadcast of the episode "Bad Choice Road", which he wrote and directed, Thomas Schnauz revealed on Twitter [1] that he was unable to direct an episode during the fourth season of Better Call Saul due to complications following surgery for his colon cancer.
Thomas has a brief cameo in the episode "Breaking Bad", appearing on one of the stolen IDs in the episode's crime montage. He was both the writer and director for this episode.