Dean Cain, who famously played Clark Kent/Superman in the 90s series Lois & Clark: The New Adventures of Superman , appeared as the villainous Dr. Curtis Knox. Key Takeaways & Trivia

Discuss the impact of this episode on .

Lex Luthor hires Knox, believing his work is legitimate. He is unaware of the murderous side effects, making it another instance where Lex's pursuit of power blinds him to the morality of his partners.

The episode reveals Dr. Knox is centuries old, having previously gone by names including Jack the Ripper.

Tell you more about role in the wider DC universe.

Lex provides a surprise assist to Clark, helping him locate the facility in time to save Chloe from having her heart harvested by Knox. Cast and Crew Director: Rick Rosenthal Writers: Al Septien and Turi Meyer

Find details on other appearances in the DC universe. Let me know what you'd like to dive into! #7.4 "Cure" Review | KryptonSite

[s13e13] Cure May 2026

Dean Cain, who famously played Clark Kent/Superman in the 90s series Lois & Clark: The New Adventures of Superman , appeared as the villainous Dr. Curtis Knox. Key Takeaways & Trivia

Discuss the impact of this episode on .

Lex Luthor hires Knox, believing his work is legitimate. He is unaware of the murderous side effects, making it another instance where Lex's pursuit of power blinds him to the morality of his partners. [S13E13] Cure

The episode reveals Dr. Knox is centuries old, having previously gone by names including Jack the Ripper. Dean Cain, who famously played Clark Kent/Superman in

Tell you more about role in the wider DC universe. Lex Luthor hires Knox, believing his work is legitimate

Lex provides a surprise assist to Clark, helping him locate the facility in time to save Chloe from having her heart harvested by Knox. Cast and Crew Director: Rick Rosenthal Writers: Al Septien and Turi Meyer

Find details on other appearances in the DC universe. Let me know what you'd like to dive into! #7.4 "Cure" Review | KryptonSite