Richard Gadd as Donny Dunn and Jessica Gunning as Martha Scott in Netflix’s “Baby Reindeer.” The pilot episode of Netflix’s hit miniseries “Baby Reindeer” presents viewers with the following message: “This is a true story.” But how much of “Baby Reindeer” creator Richard Gadd’s fictionalized retelling of a life-altering encounter with a serial stalker is actually true? John L. Krieger, …
