The hotel-room fear reinforces Hanks's convincing child performance; he reportedly studied David Moscow and watched the child rehearse scenes with Perkins to copy delivery, eye contact and nervous habits.
Reported research credits Ross and Anne Spielberg's 1985 script, Oscar nominations for Hanks and screenplay, Marshall's first female-directed hundred-million grosser, an $18 million budget and $151.7 million gross as the fourth-biggest 1988 film. A claim this was Marshall's first directed film is raised without correction here.
FAO Schwarz chopsticks remains a scene choice; a reported Playboy interview describes exhausting rehearsals and Hanks/Loggia insisting on doing it themselves despite available doubles.
A deleted sequence has Susan inspect Josh's wallet after his confession and find a Mattingly card and Zoltar ticket, then test his behavior the next morning; retaining it is proposed because it would motivate her realization.
The deleted Bubblicious test is defended as a bridge to Susan believing Josh; objections note adults also enjoy the gum and that suspecting his childhood before bed could make her complicit. Cutting it for that reason is speculation, not confirmed production history.
An unpicked-up 1990 pilot is distinguished from a successful Big series; film-to-TV failures are compared with Clueless and later successful reimaginings Friday Night Lights and Parenthood.
Deleted research scenes include tuxedo shopping and another hotel payphone call to hear the mother's voice; the wallet sequence remains the only major proposed restoration.
Zoltar Speaks was reportedly invented for the film, then copyrighted and made commercially available; a later San Antonio encounter supplied a personal example.
Josh's baby sister is reportedly uncredited and unidentified; the possibility she was someone's child is speculation.
The Shimmy Shimmy Cocoa Bop routine was reportedly Hanks's idea after his son learned it at camp.
The filmed Yankees–Royals game is identified as July 1987, with Tim Stoddard pitching to Ángel Salazar and Bo Jackson on first.
A deleted Billy-family scene reportedly features Frances Fisher as his mother; the sentence about family dysfunction is garbled.
The walking piano was reportedly built larger for the film and remained at FAO Schwarz; a Ringer feature is recommended.
The insect-robot idea reportedly already existed as Transformers Insecticons in 1985, making Josh's supposedly original insight a copy.