|Contest of Champions: Part 4|
|Air date||October 24, 2015|
|Written by||Eugene Son|
|Directed by||Tim Maltby|
Contest of Champions: Part 3
Hydra Attacks: Part 1
|“||You shouldn't be afraid to tell me anything. This changes nothing. You're still my nephew. I'm still your aunt. I'm so proud of the man you've become.||”|
— Aunt May
Hearing his brother's word, The Collector finally stands up to him and attacks him before he is given his brother's staff by Spider-Man and he destroys it, finally victorious.
Afterwards, Spider-Man talks with The Collector about their deal and he tells Spider-Man that he is taking time off collecting to explore the things he learned from the hero. Grandmaster appears and The Collector brings up his previous insult about second place just being "first loser" as the latter isn't amused about the one victory.
The Collector gives Spider-Man a bow of respect, while Grandmaster voices his desire of a rematch of his choice. However, The Collector politely turns down his brother's demand of a rematch, stating he officially retires from games. The shocked Grandmaster runs after him and pleads for him to reconsider but was ignored as they traveled to their ship and flew into space.
- Whizzer/Robert Frank
- S.H.I.E.L.D. Trainees
- New Warriors
- Aunt May
- The Grandmaster/En Dwi Gast
- Doctor Octopus/Dr. Otto Octavius
- Absorbing Man/Carl Creel
- M.O.D.O.K./George Tarleton
- Beetle/Abner Jenkins
- Sandman/Flint Marko
- The Leader/Samuel Sterns
- Abomination/Emil Blonsky
- Electro/Max Dillon
- Taskmaster/Tony Masters
- Drake Bell as Spider-Man/Peter Parker
- Jonathan Adams as Absorbing Man/Carl Creel
- Troy Baker as Hawkeye/Clint Barton
- Jeff Bennett as The Collector/Taneleer Tivan and The Grandmaster/En Dwi Gast
- Eliza Dushku as She-Hulk/Jennifer Walters
- Tom Kenny as Doctor Octopus/Dr. Otto Octavius
- Matt Lanter as Agent Venom/Flash Thompson
- Misty Lee as Aunt May
- Caitlyn Taylor Love as White Tiger/Ava Ayala
- Logan Miller as Nova/Sam Alexander
- Roger Craig Smith as Captain America/Steve Rodgers
- Fred Tatasciore as Hulk/Dr. Bruce Banner
- Travis Willingham as Skurge
- Grandmaster: This isn't over, I demand another game! A game of my choosing.
- Collector: No thanks brother, I'm done. I officially retire from games.
- Grandmaster: N-No No! You have to grant me a rematch, you have to!
- This is the last episode of season 3
- Collector announces his retirement of games to explore what Spider-Man spoke of.