Traditionally, the actor portraying Hook doubles the role of Mr. Darling. Here, Christian Borle, the actor portraying Smee, doubles the role of Mr. Darling since Christopher Walken is too old to play that role.
Many viewers who are unfamiliar with the history of staging "Peter Pan" wonder why the lead role is nearly always cast with a woman instead of a boy or man. Peter Pan's creator, J. M. Barrie, first wrote the story as a play, and from the very first production (in 1904), Peter was played by an actress - first Nina Boucicault, then Maude Adams, and then a series of other actresses (including Marilyn Miller, Eva Le Gallienne, Mary Martin, Sandy Duncan, Cathy Rigby, and Charlotte D'Amboise) over the course of the twentieth century. This first started because of English labour laws stipulating that child actors couldn't work on stage after 9 p.m., so for practical reasons, a grown woman played Peter instead of a young boy.
In the original stage play and previous incarnations of this musical, Nana, the dog who acts as a nursemaid to the Darling children, is portrayed by an actor in a dog costume crawling on his hands and knees. Here she is portrayed by a real dog.
In the stage version, as well as the previous television incarnations of this musical, Tinkerbell is portrayed by a spotlight. Here, she is CGI, but still vaguely resembles a spotlight.
The song "When I Went Home" was originally written for the pre-Broadway tryout of the original 1954 musical. It was cut and replaced with dialogue. It was restored for this production.