Penthouse is a 1933 American Pre-Code crime film starring Warner Baxter as a lawyer and Myrna Loy as a call girl who helps him with a murder case.

It was directed by W. S. Van Dyke and written by Frances Goodrich and Albert Hackett, based on a novel by Arthur Somers Roche.

Attorney Jack Durant (Warner Baxter) successfully defends racketeer Tony Gaziotti (Nat Pendleton) against a high-profile murder charge and waives his fee.

His staid law firm feels his taking the racketeer on as a client reflects badly on them; when he refuses to give up his exciting new line of work, they go their separate ways.

Shortly afterward, Sue agrees to marry Tom Siddall (Phillips Holmes), but only if he gives up his mistress, Mimi Montagne (Mae Clarke).

Jack leaves and breaks into the apartment directly above Gertie's, which he has learned belongs to Murtoch (George E. Stone), one of Crelliman's gunmen.

From the entry and exit wounds on Mimi's body, he is sure the murderer was situated higher up; the angle from Murtoch's window is about right.

He asks Gertie to marry him, but they are interrupted by a phone call from Tony, who has found out that Crelliman has decided to have Murtoch killed.

Jack takes along Police Lieutenant "Steve" Stevens (Robert Emmett O'Connor) and several of his men to trick Murtoch into confessing.

After directing Penthouse, Van Dyke told MGM production boss Louis B. Mayer that Loy would be a big star if she continued to receive the right kinds of roles.