After an eight-month stay in a mental hospital, a tormented man comes home to live with his sister; but a mysterious boarder may be trying to kill him.
Unfortunately the movie How Awful About Allan is not yet available on HBO Max.
| Directing | Curtis Harrington | Director |
| Writing | Henry Farrell | Novel |
| Writing | Henry Farrell | Teleplay |
| Production | George Edwards | Producer |
| Production | Aaron Spelling | Executive Producer |
| Sound | Laurence Rosenthal | Original Music Composer |
| Camera | Fleet Southcott | Director of Photography |
| Editing | Richard W. Farrell | Editor |
| Art | Tracy Bousman | Art Direction |
| Art | Ken Swartz | Set Decoration |
| Costume & Make-Up | Robert Harris Sr. | Costume Design |
| Costume & Make-Up | Jerrie Woods | Costume Design |
| Costume & Make-Up | Ted Coodley | Makeup Artist |
| Production | Norman Henry | Executive In Charge Of Production |
| Production | Jim Lane | Production Manager |
| Crew | Joe Lombardi | Special Effects |
