S1·E8 – Parsley and the Circus Lion

Parsley is behaving strangely. Dill gets a fright. Sir Basil upsets the newcomer to the garden but is saved from Lady Rosemary who realises that the new Parsley is not really Parsley at all but an escaped circus lion. Constable Knapweed is chasing the wrong lion in the garden. Which one is the escaped lion ?