Change is in the air in Season 4 as the Pied Piper guys pursue their video-chat app, PiperChat, but Richard has a hard time letting go of his dream to put his algorithm to better use, leaving the team struggling with how they fit into the picture. Meanwhile, Monica deals with new competition in the office, and Gavin faces big changes at Hooli and beyond.
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 father. Jack steps on Gavin's toes at Hooli. Richard gets sage advice.
Richard butts 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.
Richard continues to explore his new project. Gavin tries to come out of the new problem he has gotten himself into. The chemistry between Richard and Monica takes a new turn.
Seafood demo is being prepared. Big head professorship is proving beneficial to his students. We get a glimpse of the insides of Gavin Belson mansion.
Richard tries to convince Gavin of 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.
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.
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.
An unexpected increase in data traffic leads Richard to turn the 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.
Erlich goes on a trip to get his mojo back while the guys head to Hooli-Con, where Jared faces a moral dilemma. Gilfoyle and Dinesh are distracted by Keenan. and Richard becomes obsessed with an ex's new beau.