Murder for Two is performed by two piano-playing actors. One actor portrays:
Marcus—

MARCUS MOSCOWICZ: An ambitious young officer
(He also provides voices for two characters in flashback.)

THE CHIEF: Marcus’s grizzled boss

VANESSA: Marcus’s former partner

 

The other actor portrays:

The Suspects—

DAHLIA WHITNEY: The victim’s loopy widow

MURRAY AND BARB FLANDON: The Whitney’s bickering neighbors

STEPH WHITNEY: An overeager grad student

BARRETTE LEWIS: A self-incriminating ballerina

DR. GRIFF: A friendly local psychiatrist

TIMMY, YONKERS, AND SKID: Members of an antiquated boys’ choir

HENRY VIVALDI: A late arrival

 

The final character is Officer Lou, who isn’t played by an actor. Marcus and the suspects address him as needed. (From Kinosian and Blair. Murder for Two. 2014)