 Helga envisions what has actually occurred and tells Porter.Both realize simultaneously that the story would make an excellent thriller and that the title "Deathtrap" is ideal, but immediately argue and threaten each other over whether they will share in the rewards their "one set, five character" play, "Deathtrap" will undoubtedly reap.Following a Boston tryout at the Wilbur Theatre, "Deathtrap" enjoyed a four-year run on Broadway, opening under the direction of Robert Moore, February 26, 1978, at the Music Box Theatre, moving to the Biltmore Theatre January 7, 1982, and closing on June 13 of that year.