Every actor eventually faces the same problem: the scene is tomorrow and there's no one to run lines with. Solo line running is a skill of its own — done right, it can be more efficient than a distracted friend mumbling the other role. Here are six methods that work.
1. Record the other roles, leave gaps for yours
The classic. Record every line except yours into your phone, leaving silent gaps sized to your lines, then play it back and perform into the spaces. It forces you to respond to cues instead of reciting. The downsides: recording takes as long as the scene, and the gaps never quite fit — which is exactly the problem an AI scene partner solves by listening and responding in real time.
2. The paper-cover test
Cover your next line with a card, read your cue, and say your line before sliding the card down. Rereading feels productive; forced recall is what actually builds memory. Score yourself honestly — a line you got "mostly right" is a line you don't know.
3. Walk while you work
Movement is a memory multiplier. Pace the kitchen, do the dishes, walk the block with your sides. Attaching lines to physical rhythm gives your brain extra retrieval hooks, and performing while doing something else is the closest solo approximation of playing an objective.
4. Swap roles for a pass
Read the other character's lines aloud for one pass. You'll hear the scene's logic from the opposite side, and your own cues will lodge deeper — most dropped lines are really dropped cues.
5. Whisper runs and speed runs
Once the words are roughly in, do a whisper-quiet pass for accuracy, then a double-speed pass for retrieval strength. Speed runs expose every soft spot without the emotional crutch of performance. Save full-voice, full-intention runs for when the words are automatic.
6. End with a real, unbroken run
Finish every session with one complete, no-stopping run at performance level — the solo equivalent of a dress rehearsal. If you have to call for a line, note where and drill that transition first next session. For a run that talks back, Counterpart reads every other role with natural voices, waits for your cue, and keeps going as many times as you need — at any hour a human reader wouldn't be. It pairs well with the techniques in our guide to memorizing lines fast.
Download Counterpart for iOS and turn solo rehearsal into your edge.