Molly C. Quinn reprises her Bad Blood (2021) role as Ashley, Oscar Hutchinson's daughter. In that episode, Ashley tells Oscar "You are the worst father ever." Nolan reprises this line in this episode, telling Oscar "You really are the worst person ever." Quinn also played Nathan Fillion's (John Nolan) daughter Alexis on his previous series Castle (2009).
Kelly Clarkson made a surprise appearance in the pre-credits scene. This was the result of an invitation extended to her by Nathan Fillion during an appearance by the cast of The Rookie on The Kelly Clarkson Show in April 2022. Surprising Clarkson for her birthday, the show's producers had booked the entire cast - Eric Winter, Melissa O'Neil, Alyssa Diaz, Mekia Cox, and Fillion - as guests, since The Rookie is one of her favourite shows. Despite confessing to be a bad actor, Clarkson readily agreed to Fillion's invitation to act in the show, leading to her cameo appearance.
Lucy uses a TASER on a suspect. The company which makes and originally invented the TASER also produces the AXON Body Camera.
In the elevator, there's a shot of Kelly Clarkson and Lucy Chen (Melissa O'Neil) together where Lucy says she loves Kelly's music. In real life, they are both Idol winners. Kelly on season 1 of American Idol, and Melissa on season 3 of Canadian Idol.
"Tim Tests" and "Lucy Lessons" illustrates the literary technique known as alliteration, that is the occurrence of the same letter or sound at the beginning of adjacent or closely connected words.