Arrow Episode 21- "Undertaking"

In this episode we get a lot of flashback to when Oliver and his father were getting ready to leave on the Queens Gambit and what caused Malcolm to turn on Oliver's father. We also get to see a young Oliver and Laurel.  And we also get to see the relationship between Oliver and Digg start to heal at the end of the episode. 

Oliver tracks down an accountant, Backman, for the secret organization and steals his laptop in order to redistribute all of his money back to the people he stole from. While decrypting the laptop, Felicity uncovers a link to Walter—a $2 million transfer was made to Dominic Alonzo, an underground casino owner who was hired to kidnap Walter. With Felicity posing as a card sharp, the pair infiltrate the casino; after being beaten and threatened by Oliver as the hood, Alonzo reveals that Walter was killed.

Oliver informs his family, Moira immediately confronts Malcolm, who reveals that Walter is alive. Oliver, who was listening in, discovers that Tommy's father is heading the secret organization, and uses Felicity to hack into his phone records to ascertain Walter's location. 

As the vigilante, Oliver frees Walter and reunites him with the family. But there is an uneasy feeling with Walter towards Moira because he feels she is responsible for his kidnapping.

Meanwhile, Laurel goes to Tommy to get the truth about why he left, and Tommy reveals that he believes she is meant to be with Oliver, who still loves her. When Laurel approaches Oliver she asks him to help her get Tommy back and doesn't think what Tommy told her about Oliver is true. Oliver tells her that he can't help her because he does still have feelings for her. 

In a flashback, Robert Queen is shown disagreeing with Malcolm's proposed "Undertaking", which would involve leveling the Glades and kill thousands of people in an effort to rebuild the area and remove the crime. As a result, Malcolm has a bomb planted on the Queens' yacht just before Robert and Oliver set off. 

Will the love story between Oliver and Laurel pick back up now or will Laurel fight to get Tommy back? What will happen with the Undertaking and can Oliver stop it? Tune it find out.