Cite as 711 F.2d 141 (1983)
Contrary to plaintiff’s contention, Sid & Marty Krofft Television Productions v. McDonald’s Corp., 562 F.2d 1157 (9th Cir.1977), does not hold that summary judgment is always inappropriate on the issue of substantial similarity of expression if there is a substantial similarity of ideas. Plaintiff offers neither authority nor reason supporting such a per se rule. Summary judgment is proper if reasonable minds could not differ as to the presence or absence of substantial similarity of expression. Jason v. Fonda, 698 F.2d 966 (9th Cir.1982), incorporating by reference Jason v. Fonda, 526 F.Supp. 774, 777 (C.D.Cal.1981). Sid & Marty Krofft, 562 F.2d at 1165 (9th Cir.1977), rejected the suggestion in Arnstein v. Porter, 154 F.2d 464, 473 (2d Cir.1946), that summary judgment can be granted for the defendant only if the similarities are “trifling.”
We also disagree with plaintiff’s contention that the district court improperly applied the “scenes a faire” doctrine. The court’s characterization of the doctrine as relating to unprotected “ideas” may have been technically inaccurate, but the court properly applied the doctrine to hold unprotectable forms of expression that were either stock scenes or scenes that flowed necessarily from common unprotectable ideas. “Common” in this context means common to the works at issue, not necessarily, as plaintiff suggests, commonly found in other artistic works. Nor has the doctrine “fallen into disuse in this circuit” as plaintiff suggests. See Jason v. Fonda, 698 F.2d 966, incorporating by reference 526 F.Supp. at 777.
The district court correctly concluded that no reasonable trier of fact could find the two plays to be substantially similar in their form of expressing common ideas.
Although our reasons differ from those of the district court with respect to a few of the alleged similarities relied upon by plaintiff, we have no difficulty joining in the district court’s conclusion as to each of these alleged similarities.
Alleged similarities one, two, four, five, six, seven, eight, nine, twelve, and nineteen follow obviously from the unprotected idea of a surprised understudy, and are therefore unprotected “scenes a faire.”
Alleged similarities ten, thirteen, fourteen, fifteen, sixteen, seventeen, and twenty are not in fact similarities. There is no similarity between the life-size cut-outs on stage and flash bulbs going off in the audience; Potter does not try to explain to the audience what is going on as the accountant does; the references to Jane Fonda are entirely different; in plaintiff’s play, Potter must fill three roles at once, while in defendant’s play additional understudies are introduced, none of whom shares the accountant’s confusion; completely different types of characters are shown reading lines from a script; and the death scene and the clue to the audience that a dream may be involved are not related in time or logic in plaintiff’s play in the same way they are in defendant’s play.
The remaining five similarities are not sufficient to convince any reasonable trier of fact that the plays are substantially similar. The two plays differ substantially in their treatment of the surprised understudy. In plaintiff’s play, Potter’s predicament is one of many illustrations of actors’ fears, not the focus of the play, and the dominant emotion during her performance is the humiliation of performing incompetently. In defendant’s play, the accountant is not one of several examples, but the central figure with whom the audience identifies, and the dominant emotion is not humiliation but an Alice in Wonderland-like bewilderment about what is going on and why no one else seems to think it strange.
Plaintiff argues the district court erred by comparing the plays “as a whole” in addition to considering the alleged similarities individually, because copying of only a portion of another’s work constitutes infringement. The cases plaintiff cites establish only that where substantial similarity in protected expression does exist, it is not excused by the presence of additional, dissimilar material. See, e.g., Walt Disney
