According to Nielsen Media Research, the episode was seen by an estimated 2.75 million household viewers and gained a 0.9/4 ratings share among adults aged 18–49.
Jake (Andy Samberg) and Gina (Chelsea Peretti) attend their 20-year high school reunion with Amy (Melissa Fumero) coming with them.
In its original American broadcast, "The Tattler" was seen by an estimated 2.75 million household viewers and gained a 0.9/4 share among adults aged 18–49, according to Nielsen Media Research.
With these ratings, Brooklyn Nine-Nine was the second highest rated show on NBC for the night, beating The Good Place and Law & Order: SVU, but behind The Titan Games, third on its timeslot and seventh for the night, behind two reruns of The Big Bang Theory, Fam, A Million Little Things, The Titan Games, and Grey's Anatomy.
"[3] Alan Sepinwall of Rolling Stone wrote "Jake and Gina’s 20th high school reunion is a time for introspection as well as goofiness".