Yes. Mind Sifter was 1/3 shot because James could not appear on screen that June due to his professional obligations. The only scene he filmed was the one where Kirk had been tortured and beat up for a few weeks and, thus, his face was bruised, battered and swollen - thus covering the problems with filming him while he has "professional committtments". (that is, his Elvis sideburns)
There is one Mind Sifter scene scheduled to be shot with Brian as Kirk this June. The rest remains to be scheduled,, including re-doing the one scene James did shoot.