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 Girl Who Knew Supergirl's Secrets"
Pages: 10

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

Writer: E. Nelson Bridwell
Artist: Kurt Schaffenberger

Feature Character(s)

• Supergirl (last appearance in Adventure Comics #393; next appearance in Adventure Comics #394)

Other Character(s)

• Jan Butler (first name given as Janice; last appearance in Adventure Comics #391; no further appearances)
• Dr. Alexander (a professor; no further appearances)
• Several Stanhope students (no further appearances)

Cameo Appearance(s)

• Zor-El (in flashback)

Synopsis:
Linda Danvers and her roommate Janice Butler attend a class about Supergirl. Janice presents information about the Maid of Might which has never been publicly revealed. Linda wonders how Janice came to know so much about her past. When Janice brings a Supergirl robot to class, Linda fears that her secret identity will be exposed. Linda covers up her secret then blames an alien plant which seems to be broadcasting thoughts. However, the plant is only a ruse. Linda realized that she was talking in her sleep and revealing secrets to Janice without either of them being aware. Supergirl hypnotizes herself, so that she will no longer talk in her sleep.