bkr watchdog-show currently fails with an uninformative error for automated jobs that haven't started yet. It should indicate the first task hasn't started yet if the watchdog kill time is still None.
http://gerrit.beaker-project.org/2735
http://gerrit.beaker-project.org/#/c/2798/
Ignore the gerrit link from comment#4, it is for a different BZ.
Beaker 0.15.4 has been released.