The duration of The Secret of the Iron Door is 1.15 hours.
The duration of The Secret Saturdays is 1320.0 seconds.
The duration of Visible Secret is 1.63 hours.
The duration of The Secret of NIMH is 1.37 hours.
The duration of Secret of the Cave is 1.47 hours.
The duration of Secret Window is 1.6 hours.
The duration of Secret Beyond the Door is 1.65 hours.
The duration of The Mine with the Iron Door is 1.33 hours.
The duration of On Secret Service is 1.48 hours.
The duration of Secret Venture is 1.17 hours.
The duration of The Secret of the Grain is 2.52 hours.
The duration of Secret Sunday is 1.83 hours.
The duration of Sharing the Secret is 1.5 hours.
The duration of Burning Secret is 1.77 hours.
The duration of Deadly Secret is 2700.0 seconds.
The duration of Secret of the Wings is 1.53 hours.
The duration of Secret Honor is 1.5 hours.
The duration of Kate's Secret is 1.67 hours.