The fourth season of the television comedy series Silicon Valley originally aired from April 23, 2017, on HBO to June 25, 2017, in the United States.
- Thomas Middleditch as Richard Hendricks
- T.J. Miller as Erlich Bachman
- Josh Brener as Nelson Bighetti
- Martin Starr as Bertram Gilfoyle
- Kumail Nanjiani as Dinesh Chugtai
- Amanda Crew as Monica Hall
- Zach Woods as Jared Dunn
- Suzanne Cryer as Laurie Bream
- Matt Ross as Gavin Belson
- Jimmy Yang as Jian-Yang
- Stephen Tobolowsky as Jack Barker
- Chris Diamantopoulos as Russ Hanneman
- Chris Williams as Hoover
- Haley Joel Osment as Keenan Feldspar
- Ben Feldman as Ron LaFlamme
- Milana Vayntrub as Tara
- Bernard White as Denpok
- Andy Daly as Doctor
- Alice Wetterlund as Carla Walton
- Emily Chang as herself
- Ping Wu as Henry
- Matt McCoy as Pete Monahan
- Scott Prendergast as Scott
- Jill E. Alexander as Patrice
- Anna Khaja as Rachel
- Jake Broder as Dan Melcher
- Phoebe Neidhardt as Mia
|"Success Failure"||April 23, 2017|
|Directed by: Mike Judge - Written by: Alec Berg
In the wake of Pied Piper's clickfarm scandal, the guys struggle to find funding for Pied Piper's video-chat app to keep up with their rapidly-growing user base. Erlich faces resistance from Big Head's dad, while Gavin balks after Jack steps on his toes at Hooli. Having a hard time adjusting to his company's pivot, Richard gets some sage advice from an unexpected source, leading him to a big idea that could change his future.
|220px||"Terms of Service"||April 30, 2017|
|Directed by: Mike Judge - Written by: Clay Tarver
Richard butt heads with Dinesh, whose new position goes to his head. Richard discovers interesting data about PiperChat's users. Erlich makes a play to be involved in Jian-Yang's new app. Jared sets ground rules in his friendship with Richard. Gavin's paranoia over Jack's enthusiasm causes him to make a rash decision.
|220px||"Meinertzhagen's Haversack"||May 7, 2017|
|Directed by: Jamie Babbit - Written by: Carrie Kemper
Richard continues to explore his new project. Gavin tries to come out of the problem he has gotten himself into. The chemistry between Richard and Monica takes a new turn.
|220px||"Teambuilding Exercise"||May 14, 2017|
|Directed by: Jamie Babbit - Written by: Megan Pleticha
The SeeFood demo is being prepared. Big Head's professorship is proving beneficial to his students.
|220px||"The Blood Boy"||May 21, 2017|
|Directed by: Adam Countee - Written by: Tim Roche
Richard tries to convince his new business partner Gavin about his strategy for the new internet, but finds himself blocked by meddling from an annoying associate of Gavin's. Erlich connives his way into Laurie's baby shower and tips her off to a hidden agenda. Dinesh struggles to free himself of Mia.
|220px||"Customer Service"||May 28, 2017|
|Directed by: Clay Tarver - Written by: Graham Wagner, Shawn Boxe
The guys struggle for funding to launch the latest iteration of Pied Piper. Erlich seeks to join the new VC firm formed by Laurie and Monica. Dinesh and Gilfoyle clash over the alpha build.
|220px||"The Patent Troll"||June 4, 2017|
|Directed by: Jamie Babbit - Written by: Andrew Law
When Richard decides to stand up to a patent troll, his defiance ends up coming back to haunt him. Gilfoyle goes to desperate measures to battle Jian-Yang's new smart refrigerator. Jared embraces multiple identities in in his quest to reduce costs. Erlich tries to hang with the alpha males.
|220px||"The Keenan Vortex"||June 11, 2017|
|Directed by: Jamie Babbit - Written by: Graham Wagner, Rachele Lynn
An unexpected increase in data traffic leads Richard to turn to Ehrlich for help in garnering a deal with Keenan Feldspar, Silicon Valley's latest 'it' boy, but when he makes a too-good-to-resist offer, Richard must weigh Pied Piper's future against a potential mutiny. Jack faces setbacks while preparing for Hooli-Con.
|220px||"Hooli-Con (episode)"||June 18, 2017|
|Directed by: Mike Judge - Written by: Chris Provenzano
The guys are preparing undercover operation at Hooli-Con. To ensure enough space to run their app. This forces Dinesh to meet his destiny. While Erlich heads on a soul searching journey after his inconceivable loss.
|220px||"Server Error"||June 25, 2017|
|Directed by: Mike Judge - Written by: Dan O'Keefe
Richard finds himself in a web of lies, Jared plans his exit, while Jack bets big and Gavin plots a comeback.