Perhaps the best Lost In Space episode of them all! Very well written and directed, and of course very well acted by young Angela. As with other outstanding episodes, note the dramatic use of light and dark, especially in the scenes behind the mirror. Angela’s expressiveness is particularly moving in the last scene by the mirror, as she realizes the boy is not following her out, but doesn’t understand it’s because he can’t, not that he won’t. Truly a heartrending scene.
1a. Angela Cartwright's Home Page
1b. Angela Cartwright's "Said & Done" Blog
1c. Angela Cartwright Studio on Facebook
2. Guy Williams, Official Family Tribute Site
3. June Lockhart
4. Mark Goddard's Home Page
5. Marta Kristen's Home Page
6. "Never Fear: Smith is Here" An Evening With Jonathan Harris
7a. Bob May Home Page
7b. Tribute to Dick Tufeld
8. Official Bill Mumy Site
9. The Irwin Allen News Network
Lost in Space Forum
Penny Robinson Fan Club 
Love the yellow ribbons in Penny’s hair, so cute!
DEAR PENNY ROBINSON I AM A BIG FAN OF YOURS
I USED TO WATCH LOST IN SPACE. 1968 I USED TO BE 12 YEARS OLD.
I LOVE TO MEET THE CAST. TELL ME WHERE TO GO. WHAT HAPPEN TO
WILLIAM ROBINSON HOU PLAYED YOUR FATHER. YOU GUYS SHOULD
HAVE A REUNION ABOUT TE LOST IN SPACE TRY TO MAKE A NEW SEQUAL.
TS LOVE TO HEAR FROM YOU.