[1] On January 29, 2020, the Boston cast celebrated its 40th anniversary (the show's 12,580th performance) at The Charles Playhouse Stage II.

The landlady, Isabel Czerny, who lives above the shop is murdered and the audience gets involved in the action by questioning the actors and attempting to solve the crime.

The ending of the play is different every night as audience members hear clues, question the characters, and then vote on who they think is guilty.

In 2003 Saban adapted the play for the second time; he introduced SMS messages and online chat as means of interaction.

[7] A Spanish adaptation by director Rina Rajlevsky, written by Alberto Lomnitz and Ricardo Esquerra, opened in 2017 in Mexico City.