Gordon-Levitt and Hewson have excellent chemistry, but the fact that most of their interactions take place via Zoom surely presented an acting challenge. Most often shown as a face on a screen, Gordon-Levitt had to establish his character without the benefit of considerable body language. Hewson was not as restricted, as she freely interacts with other performers.

Cal and Erin struggle to meet the past on their own terms: Cal approaches life from a position of anxiety, while Erin projects tenacity; but they are equally grasping for purchase against the upheavals that have warped what was once familiar. Both performances reveal a slow seething to the surface: Richardson has a severity to her demeanor, which articulates Erin’s determination to rectify old wounds and pay off a karmic debt; while Teague is tortured by his inaction.

Paul Gordon as David is the highlight of the movie since his delivery is so awkward and dry. David seems like a boring person doing his best to impress Anna since he and his wife recently separated. He doesn’t come off as creepy and there’s a certain charm to his droning dialogue that gives the movie a comedic aspect that it needs. While David and Joan mirror Anna and Bo in some ways, they aren't as key to the overall plot as they could have been and fleshing out their characters could have added a lot more to the movie.

De Niro and Thurman are too good – and too famous – to be in a picture like this. The same can be said for Christopher Walken, who appears in several scenes as one of Ed’s buddies. These actors elevate the movie to a degree, and I admittedly laughed, probably more than I should have. That said, The War With Grandpa is not objectively good. It mixes TV comedy plotting with an A-list cast and thematic elements that are slightly disturbing.