It took longer than I'd have liked, but the character keeper for The Between has been updated with support for The Martian, from Season 4!
The character keeper for The Between includes:
(optional) character creation walkthrough
playbooks up to season 4
a phase tracker to help play
support for The Unscene
a rules reference
threat tracker
info and safety sheets
Check it out! http://www.arktosaur.us/keepers/thebetween
(Google account required, this link will prompt you to make a copy into your Google Drive.)
And did you know that Brindlewood Bay is currently on Kickstarter? If you haven't, you should absolutely check it out!