* In [[Richard Donner]]'s [[Superman (1978 film)|''Superman: The Movie'']] and [[Bryan Singer]]'s ''[[Superman Returns]]'', Lex briefly mentions his father—but not his father's name—as the inspiration of Lex's real estate schemes. Lex also says his father was a harsh man who ejected him from the family home.<ref>{{cite video|people=[[Richard Donner]] (director), Mario Puzo, David Newman, Leslie Newman, & Robert Benton (writers)|date=December 15, 1978|title=Superman: The Movie|publisher=[[Warner Bros.]]}}</ref><ref>{{cite video|people=[[Bryan Singer]] (director), Michael Dougherty & Dan Harris (writers)|date=June 28, 2006|title=Superman Returns|publisher=[[Warner Bros.]]}} Lionel made an appearance on the February 13 episode of Supergir.l</ref>
* In [[Zack Snyder]]'s ''[[Batman v Superman: Dawn of Justice]]'', Lex is named after his father, Alexander Luthor, Sr., an oil and machinery tycoon immigrant from Germany who died in 2000.<ref>{{cite web|last1=Pathak|first1=Shareen|title=Fortune ‘profiles’ fake person Lex Luthor in content marketing stunt|url=https://digiday.com/marketing/fortune-profiles-fictional-character-lex-luthor-content-marketing-stunt|website=Digiday|publisher=Fortune|access-date=October 7, 2015}}</ref> When confronting Superman, Lex mentions his father's abusive behavior in his childhood. A newspaper article in the film erroneously refers to him as Lionel Luther, like in ''Smallville'', though it is unknown if this was a mistake or an intentionel nod to ''Smallville.
* InLionel Luthor appears in a flashback of the ''[[Supergirl (TV series)|Supergirl]]'' episode "Luthors", Lionel is portrayed by Ian Butcher.<ref>{{cite web|last1=Topel|first1=Fred|title=Mr. Mxyzpltk Leads the Top Five Moments from Supergirl's 'Luthors'|url=https://editorial.rottentomatoes.com/author/fred-topel|website=Rotten Tomatoes|publisher=Fandango|access-date=March 1, 2017}}</ref> He is a billionaire and the founder of his family's company LuthorCorp as well as resembling the future Lex Luthor (portrayed by [[Jon Cryer]]) with his baldness. It's revealed that sometime after marrying Lillian (portrayed by [[Brenda Strong]]) and having Lex, Lionel began an extramarital affair with an unnamed woman that would lead to the conception of Lena Luthor (portrayed by [[Katie McGrath]]). Once Lillian discovered the affair, he ultimately chooses to remain with his family. After the death of Lena's mother, Lionel takes in his illegitimate daughter but lies to her and the public that his second child is adopted. Lionel favors Lena over Lex due to his love for her mother, leading to tension with his wife and son, especially due to his emotional distance from Lex growing up. It is also revealed in "The House of L" that Lionel had become an alcoholic later in his life, contributing to his family's dysfunction. Lionel died sometime afterwards due to unknown circumstances and Lex inherited his father's fortune to lead LuthorCorp for years until his imprisonment. Lena then takes over leadership of LuthorCorp, relocates the company's headquarters from Metropolis to National City, and renames it L-Corp, attempting to redeem her family name from Lex's actions. When Lena learns her true paternity from Lillian, she becomes determined to restore the Luthor name for both her father and herself.
* Lionel Luthor appears in the ''[[Titans (2018 TV series)|Titans]]'' episode "Conner", portrayed by [[Peter MacNeill]]. This version is almost blind and haswas noa former hairscientist. Connor and [[Krypto]] arrives at Lionel's Kansas house upon a memory drawing him to it. He told Connor everything about his son and Clark before Connor is ambushed by [[Mercy Graves]]' [[Project Cadmus|Cadmus]] team. Connor worked to protect Lionel from the Cadmus team after he got attacked by one of the soldiers. The next day, Mercy gave Lex a status report while also mentioning that his father is doing alright.
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