Krapp's Last Tape, one of Samuel Beckett's best-known plays, is being performed tonight only at Emmanuel Church, 15 Newbury St. in Boston. It's a one-man show, so a lot depends on the acting of the guy who plays Krapp, an eccentric old man who keeps a recorded diary, making one tape each year. The action of the play consists of Krapp playing one tape and making another. The cast of this production consists of Jim Cooke, a member of the Cambridge Ensemble and a teacher of theater education at Emerson College. At 8 p.m., tickets one dollar.

Another Part of the Forest is mentioned briefly above, in something that purports to be a review. Tonight through Friday at the Loeb at 8, Saturday at 5 and 9. Tickets are $5.50 and $6.50, but Harvard-affiliated people get one dollar off on tickets bought in advance, and student rush tickets are $3.75.