First episode to include the Lazarus Pit in action.
The painting on the wall during the dinner scene in Nanda Parbat is the missing part of the Ghent altar piece, it was stolen in the early 20th Century and never retrieved.
This is the first time the audience sees Ra's al Ghul use a bow.
The 'Hong Kong Botanical Gardens' scene was filmed in the 'Dr. Sun Yat Sen Classical Chinese Gardens' in Vancouver.