Brady is approached by Colonel Warren (Douglas Wilmer) of Military Intelligence as one of their top agents, Jack Howard (Howard Pays), is being held prisoner in a Middle Eastern country.  Howard, badly injured after an abortive escape attempt, is being guarded in a high security hospital and only the Invisible Man – along with the alluring local assistance of Yolanda (Adrienne Corri) – has any chance of freeing him ….

Fictitious Middle Eastern countries, forever teetering on the edge of instability, would be a staple of ITC adventure series during the next decade or so and Crisis in the Desert is an early example of this genre.  Naturally, foreign location filming was beyond the series’ budget, so instead we have a reasonably dressed backlot (which doesn’t look too shabby, it must be said).

Ethnic actors would also tend to be in short supply whenever an ITC series headed abroad, so it’s no surprise to see British performers in all the main roles.  The eagle-eyed will spot Derren Nesbitt in the background, but the bulk of the action is divided between Corri as Yolanda, Eric Pohlmann as Yolanda’s associate Hassan and Martin Benson as the villainous Colonel Hassan.

These three, along with Wilmer, make Crisis in the Desert a very enjoyable watch.  Wilmer oozes charm as he persuades Brady (rather easily it must be said) to undertake a dangerous mission in the Middle East.  It’s interesting that Warren reacts with horror when Brady tells him he thinks he’s close to reversing his invisibility – it’s obvious that Warren needs an invisible man to rescue Howard, but it’s odd that he doesn’t seem to have considered the possibility that once Brady has perfected his formula it could be duplicated.  Creating a whole army of invisible agents would have obvious benefits.  Given this, it seems a little foolhardy to risk Brady’s life (and the knowledge that only he has) on this jaunt abroad.

Corri had already racked up an impressive list of credits before appearing here as the glamourous freedom-fighter Yolanda.  She looks very nice in a nurse’s uniform as well.  Pohlmann has less to do, only react to Yolanda, but he’s effective enough.  Benson is great fun as the sadistic Hassan – he opens the story by slapping Howard about and later suggests to an unfortunate surgeon (played by Derek Sydney) that he performs a little brain operation on Howard in order to make him more pliant.

Several actors black up – most notably Peter Sallis as Nesib, the ambulance driver.  This probably isn’t a performance that’s going to be at the top of his cv, but for a working actor of this era playing the most unlikely nationalities was an occupational hazard (Sallis would later appear as an equally unconvincing Chinaman in an episode of Sergeant Cork).

The main problem with Crisis in the Desert is that there’s no real need for Brady to be there at all, as although he sneaks around the hospital in his invisible state, Nurse Yolanda is in plain sight all the time.  As we’ll see, this proves to be something of a problem for the writers – often the gimmick of having an invisible man tends to be sidelined as Brady is shoehorned into plots that don’t require his invisibility skills to be utilised.