"Touch of Eva" is the 69th episode of the CW television series, Gossip Girl, as well as the fourth episode of the show's fourth season. The episode was written by Leila Gerstein and directed by Andrew McCarthy. It aired on Monday, October 4, 2010 on the CW.

Touch of Eva deals with the transformation of Chuck Bass (Ed Westwick) since the arrival of his new love, Eva Coupeau (Clémence Poésy), to New York. The episode also delves into the resurging feelings that Blair Waldorf (Leighton Meester) may or may not have for Chuck, Dan Humphrey (Penn Badgley) facing the aftermath of losing his son that slowly drives him into the arms of Serena van der Woodsen (Blake Lively), and the growing relationship between Nate Archibald (Chace Crawford) and the mysterious Juliet Sharp (Katie Cassidy). The episode is currently the second highest-rated episode of the fourth season.

The episode opens with Blair receiving news of Chuck Bass donating to charities with Eva at his side. Gossip Girl further irks Blair when she shows an image of Chuck giving Eva an expensive jeweled Cartier Baignoire watch after a charity event. With Serena still wondering who to choose between Nate and Dan and Blair's growing jealousy against Eva, both girls agree not to meddle in their respective affairs. Dan wakes up to find Vanessa staging an intervention to persuade to express his hurt over losing his son, Milo. Choosing to avoid expressing his hurt feelings, Dan proceeds to Blair's apartment to find Serena and hangout. At the Empire Hotel, Chuck and Eva announce a donation of $5,000,000 to a charity but has not made up his mind as to which charity it will go. Nate and Chuck converse over his transformation and Nate's concerns over Juliet's hectic schedule.

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