For those who find particle physics a breeze and John le Carre's spy novels kids' stuff, figuring out "Hapgood" will present no difficulties. For most everyone else, Tom Stoppard's drama is likely to prove flummoxing. Churchill's famous description of Russia as "a riddle wrapped in a mystery inside an enigma" applies here. It takes a nimble mind, an alert eye and graph paper to get to the bottom of this one. — David Richard in the New York Times, December 5, 1994

First performed at the Aldwych Theatre, London (dir. Peter Wood) on March 8, 1988.  First US production, with revisions, at the Doolittle Theatre, Los Angeles (dir. Peter Wood) on April 12, 1989.  First NY performance was the Lincoln Center production at the Mitzi E. Newhouse Theatre (dir. Jack O'Brien) on November 11, 1994.

1. Hapgood
   • Faber and Faber, 1988 [ISBN: 0571151590] 89pp
   • Faber and Faber [pb], 1988 [ISBN: 0571151604] 89pp
   • Samuel French [pb], 1988 [ISBN: 0573017816] 71pp
   • Samuel French [pb], 1988 [ISBN: 0573691703] 143pp (?)
2. Hapgood [revised, "Broadway edition"]
   • Faber and Faber, 1994 [ISBN: 0571151590] 77pp *
   • Faber and Faber [pb], 1994 [ISBN: 0571198570] 77pp *
3. Tom Stoppard: Plays 5
   • Faber and Faber [pb], 1999 *