Witness is a 1985 American neo-noir crime thriller film directed by Peter Weir, and starring Harrison Ford, Kelly McGillis and Lukas Haas, with Jan Rubeš, Danny Glover, Josef Sommer, Alexander Godunov, Patti LuPone and Viggo Mortensen in supporting roles. The film focuses on a police detective (Ford) protecting an Amish woman (McGillis) and her young son (Haas), who becomes a target after he witnesses a brutal murder in a Philadelphia train station.
In April 1984, an Amish community outside Lancaster, Pennsylvania, attends the funeral of Jacob Lapp, who leaves behind his wife Rachel and eight-year-old son Samuel. Rachel and Samuel travel by train to visit Rachel's sister, which takes them into Philadelphia. While at 30th Street Station waiting for a connecting train, Samuel goes into the men's room and witnesses the brutal murder of an undercover police officer.