Comic Title: Adventure Comics #393
Publisher: DC (National Periodical Publications, Inc.)
Address: 909 Third Avenue, New York, NY
Cover Date: May 1970
On Sale Date: March 26, 1970 Copyright Date March 26, 1970
Source: Library of Congress, Periodicals 1970

Newsstand Date March 26, 1970
Source: Comic Reader, #77

Frequency: Monthly (semi-monthly, March)
Cover Price: $0.15
Page Count: 32
Editor: Mort Weisinger

Title: "The Unwanted Supergirl"
Pages: 12

Feature(s):
Supergirl (of Earth-1)

Writer: Robert Kanigher
Penciller: J. Winslow Mortimer
Inker: Jack Abel

Feature Character(s)

• Supergirl (last appearance in Adventure Comics #392; next appearance in Adventure Comics #393)

Supporting Character(s)

• Dick Malverne (last appearance in Action Comics #350; next appearance in Supergirl #23)

Villain(s)

• Mr. Mxyzptlk (disguised as Professor Miles Morrison; last appearance in Adventure Comics #386; next appearance in Superman #283)

Guest Appearance(s)

• Superman (last appearance in Action Comics #388; next appearance in Superman's Pal Jimmy Olsen #129)

Other Character(s)

• Astra Allison (an actress; no further appearances)
• Princess Jeannette and her parents (no further appearances)

Synopsis:
Professor Miles Morrison unveils a crime prediction machine at Stanhope College. The first prediction made by the machine is an assassination attempt on the life of Princess Jeannette. Supergirl arranges to take the place of the princess, but Jeannette's parents refuse. Moments later, the princess is killed in a car bomb.

Next the crime machine reveals an upcoming blackmail threat against actress Astra Allison. The actress refuses Supergirl's help and has her career ruined when the blackmailer make good on his threats.

Supergirl returns to Stanhope in disgrace. The professor's machine predicts Supergirl will retire. The Maid of Might smashes the machine in anger. Filled with guilt, Supergirl rebuilds the machine which spits out another prediction. Morrison reads it aloud only to find it contains the word Kltpzyxm. Morrison is then revealed as Mr. Mxyzptlk and vanishes for another 90 days. The effects of his magic which include everything surrounding Supergirl's disgrace disappear with him.