★ 6.5
★ 7.2
★ 0.0
★ 0.5
★ 4.4
★ 5.8
★ 6.0
★ 7.8
★ 7.4
★ 6.8
★ 4.3
★ 6.9
Colonel Barclay is found dead and his wife is arrested for the murder, but Holmes is convinced a missing door key will reveal the true killer.
