"Let The Games Commence" is the fifth episode of Season 3 of Robin Hood and the 31st episode of the series as a whole.
Guy's long-lost never before mentioned sister Isabella appears in Sherwood, running away from her husband's servants. Robin rescues her and they bicker a whole bunch and flirt too until he realizes that she's part Gisborne. Guy returns to Nottingham, apparently having pleased Prince John, and unleashes a lion upon Sherwood forest. The outlaws are dumbfounded.
- First appearance of Isabella.
- Includes a lion.
- Gisborne returns in this episode.
- Robin Hood ... Jonas Armstrong
- Gisborne ... Richard Armitage
- Tuck ... David Harewood
- Sheriff ... Keith Allen
- Little John ... Gordon Kennedy
- Much ... Sam Troughton
- Allan A Dale ... Joe Armstrong
- Isabella ... Lara Pulver
- Kate ... Joanne Froggatt