In "Lessons in Chemistry" Season 1, Episode 7, titled "Book of Calvin," the series takes a deep dive into the life of Calvin Evans, the late partner of Elizabeth Zott, whose absence continues to cast a long shadow over the narrative . This episode is a poignant exploration of Calvin's past, present, and the legacy he leaves behind, offering a richer understanding of a character who, despite his untimely death, remains central to the emotional core of the series .

The episode begins with a glimpse into Calvin's childhood at the St. Luke's Boys School, an orphanage where he grew up. We see him sneaking Chemistry books during Bible Studies, racking up demerits for being tardy, and running an underground bootleg hooch business for the head priest, who exploits Calvin's intelligence for his own profit . This early exposure to manipulation and deceit colors Calvin's worldview and shapes his aversion to forming lasting relationships and his attachment to science .
The revelation of Calvin's upbringing provides insight into his character's complexity. His closed-off nature and temper are traced back to the lies and emotional abuse he suffered at the hands of the priest, who manipulates Calvin into believing that his family abandoned him because they found him wanting . This lie becomes a part of Calvin's fabric, influencing his self-perception and his approach to life .
As the episode progresses, we see Calvin as an adult, working at Hastings Lab and grappling with the unwanted attention after being featured in Scientific American. His encounter with Curtis Wakely, a divinity student, leads to an unlikely friendship. Their exchanges, initially about science and faith, evolve into a bond that challenges both men's beliefs and lives .
Calvin's relationship with Wakely is a highlight of the episode, showcasing a man who, despite his aloof exterior, is capable of deep connection and love. Their correspondence reveals Calvin's inner turmoil, his fears of abandonment, and his struggle with the idea of being "broken" due to his past . Wakely's influence encourages Calvin to embrace "unknown variables," leading him to open up to Elizabeth Zott, with whom he falls deeply in love .
The episode also explores Calvin's romantic side, as he contemplates proposing to Elizabeth. His search for the perfect engagement ring and his subsequent decision to respect Elizabeth's wishes not to marry add depth to their relationship, highlighting Calvin's respect for Elizabeth's autonomy and his own evolving understanding of love .
However, the episode's most significant revelation comes when Calvin's past and present collide. Mad, Calvin's daughter, discovers a connection between her father and Reverend Wakely, setting off a chain of events that lead to the uncovering of Calvin's true parentage . The revelation that Avery Parker, the founder of the Remsen Foundation, is Calvin's mother, adds a new layer to his story and provides a potential direction for future episodes .
The episode concludes with a powerful scene at St. Luke's, where Mad and Elizabeth confront the priest who lied to Calvin about his family. Their discovery of a library card bearing Calvin's name in a book donated by the Remsen Foundation suggests that Calvin's story is not over, and there is more to uncover about his past and his connection to the foundation .
In conclusion, "Book of Calvin" is a compelling and emotional exploration of Calvin Evans' life, from his troubled childhood to his profound impact on those who loved him. The episode expertly weaves together Calvin's past and present, offering a deeper understanding of his character and setting the stage for future revelations. It is a testament to the power of storytelling and the enduring legacy of a man who, despite his absence, continues to shape the lives of those around him .